A file extension is an optional alphanumeric identifier which comes after the last found period in a file name. A file extension itself does not define what type of data is in a file, but it does give a hint as to what is *supposed* to be in the file.

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LibreOffice: How to open embedded document

I'm using both LibreOffice and MS Office 2010 on Windows 7 with .pptx extension associated with LibreOffice and .xlsx extension associated with MS Excel(I installed MS Office first, and then installed ...
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2answers
37 views

Does changing or removing file extension trick antivirus software?

I have little experience of antivirus software. I wish someone help me with common antivirus behaviors. For example, I have an EXE or PDF file containing virus. Does removing the .exe/.pdf or ...
-1
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3answers
38 views

Windows 7 does not update the default application path

I am developing an application in W7. My application is the default app for TIF files. That means our users can set the app as the default application to open the .tif extension. The problem is, ...
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3answers
54 views

Windows wildcards with files having more than 3 characters extensions

On Windows 7, I have a directory containing the following four files: xxx.txt xxx.txt2 xxx2.txt xxx2.txt2 With the file have more than 3 character as a file extension, the behavior of the wildcard ...
2
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1answer
31 views

How do I specify that a file extension needs to be run with a switch?

I would like to make certain open with a specific program, but that program requires a specific switch to be provided for it to actually open it. How would I go about setting this up? The specific ...
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2answers
18 views

What file extensions should be used on GPG generated output?

In Linux file name extensions are irrelevant, but on a Windows system, many GPG users use GUI applications rather than the command line. They may want to be able to double click on an encrypted file, ...
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2answers
46 views

Is there a disadvantage to not using text file extensions?

I recently learned that file extensions (at least for plain text) in a Unix-like environment generally don't have meaning. Whether a bash script has a .sh,.log,.txt, or .hgfjgfdjgd, it can still run ...
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1answer
53 views

How to split multiple videos from a single VOB file?

A VOB (Video Object) file is a DVD media extension which can hold multiple videos. How can I split these videos from a single VOB file to multiple MP4 (or other extensions) files on Windows platform? ...
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27 views

More complex file extension on windows using two extension approach?

On Windows, I can have an app associated with *.txt file. So all *.txt open in AkelPad (notepad replacement). However, this editor is great but does not support international characters well. ...
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1answer
42 views

Why is the dot/period character used as file extension separator?

Why dot and not any other character? What's the historical reason behind it?
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0answers
28 views

I associated Notepad to .Java files accidently, how do I undo this? [duplicate]

I am using Windows 8, I associated Notepad to open .Java files, all java files changed icon to the notepad one as a default program. I need to undo this step and make java files not associated to any ...
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2answers
73 views

How to restore the ability to modify the association for the .txt file extension in Windows 7 Pro?

The Problem: The Properties dialogue box for text files has lost its accustomed Change button From the list of extensions in Control Panel\Programs\Default Programs\Set Associations, the .txt file ...
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23 views

kdevelop: Treat file extension like *.icc as ordinary C++ source file

I have some interface files which are called *.icc. How do I persuade kdevelop (4.3.1) to just treat these as ordinary (C++) source files? When I try to open such a file, kdevelop complains ...
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0answers
51 views

Extracting and viewing the contents of an old game demo's art assets. ART format?

I'm trying to extract some old game artwork from a demo. The demo was for a cancelled game from 1999/2000 based on the tabletop wargame Gorkamorka. The demo can be found here. I've been able to get it ...
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2answers
130 views

How can I open a file with Notepad without permanently associating its extension with Notepad?

I’m a developer; I basically work in a Windows 8 environment with several virtual machines running Linux, Windows, etc. I want to prevent Windows associating new file extensions. That is, if I want ...
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1answer
61 views

Incorrect File association for .exe files in Windows

I accidentally chose 'open with this program this kind of file' for .exe files. Now, all the files with a .exe extension open with a particular program. My computer does not have an earlier restore ...
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0answers
12 views

Multiple extension association

Is there a way to associate an exe to an extension, and another exe when multiple files of the same extension are selected? (e.g.: one mp3 player for a single file, another for a list of files)
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0answers
87 views

How do I open the file with extension .srdt?

Can someone help me out with this. I urgently needed to access a set of files with extension .srdt. I have already tried TrID and it shows the file to be of (zip) type. However I do not know which ...
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0answers
41 views

How to change '.py' file from 'PY File' to 'Python File' in Windows? [duplicate]

I want to implement drag and drop of files onto a Python3 script. I noticed that my Windows7 64bit does not recognize '.py' as 'Python File' but as 'PY File' (Windows is just capitalizing the file ...
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1answer
33 views

How to set a default Application for an File Extention in Windows 7?

How to set a default Application for an File Extention (for example *.aaa , *.bbb , *.ccc ,...) in Windows 7
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2answers
152 views

right click on program > “%1” %* instead of run

I have windows 7 and downloaded a program (.exe possibly containing a virus), but didn't install it. Then I right clicked on the program > open with > notepad (always use this program not selected), ...
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2answers
1k views

How can I convert prnx file to excel?

I have sales reports with a .prnx extension. I want convert them to Excel format. How can I do this?
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1answer
87 views

What is .zix type of file and how to open it?

I am having a tough time searching through internet , "How to extract a .zix file ?". I herd of winzix but that's more of a BAD - ware (virus, adware ,...etc) then, after a real hard time I found ...
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1answer
24 views

Autofix file extensions based on content

Is there an app/script what will peek at file content and try to guess the correct file extension? I have a bunch of files recovered from a backup and it's a mix of images, videos and documents. The ...
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2answers
240 views

How to get a text list of files names in a folder in windows

I have a folder that has different file formats, is there a way to get all the files names and their extensions at once instead of copying and pasting
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0answers
54 views

Can't un-associate .css extension from Visual Stdio 2013

In - Control Panel\Programs\Default Programs\Set Associations under .css file , it has Microsoft Visual Stdio 2013 as Currect Defualt - I try to change its current default under the Change ...
2
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1answer
48 views

Windows - don't hide file extensions of certain types

I want to hide all file extensions except for certain extensions/types. Is this possible? I don't like the clutter of file extensions but as a developer I find it helpful to know the extensions of ...
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3answers
68 views

moving a file based on its extension in BATCH

I am making a batch script to move files based on their extension, so for example: video.avi would go to Videos text.txt would go to text files I am using the drag and drop technique of getting the ...
0
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1answer
308 views

Add context menu items to specific file extensions

I think the title says all I want: I want to add context menu items for a specific file type like the yellow marked ones in the screenshot. Which registry changes do I have to make? In my case I want ...
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1answer
2k views

Windows 8.1 won't start a file extension using a .jar file, eventhough it's possible in windows 7

Here is a picture of the file i want to open, and the program i want to open it with. If i just click the jar file, it opens my program smoothly (I made that java progrma my self), no questions ...
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1answer
429 views

How to extract the filename without the extension from a full path?

I'm trying to right my first bash script, and at one point a filename is passed to the script as $1. I need to extract the file name without the extension. Currently, I'm assuming that all extensions ...
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1answer
91 views

What are the default programs to open docx, PDF and ZIP files on OS X?

I'm writing an article about DOCX, PDF and ZIP extensions. But first, I need to know the programs which are used to open these extension as default (without any third-party applications). I don't ...
0
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1answer
79 views

How to associate a file extension to be opened with a batch script?

I want to get rid of OSPPSVC (Office Software Protection Platform Service). Then, I have replaced the links to open Office programs with a link to launcher.bat: @echo off title Launching Office... ...
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1answer
178 views

Intellij 12+: is there a way to set default code style?

I work with a lot of javascript files that are not suffixed by ".js", so Intellij renders no code style at all (no coloration or auto-complete) unless I put <script> tags around the code (which ...
2
votes
1answer
52 views

What is the file name + extension for a file with a period as the first character (example: .txt)?

I'm trying to find an authoritative answer on this matter, but it's difficult. Wikipedia kind of dances around the issue but isn't explicit enough. For .txt (to use an example), is the base name ...
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0answers
27 views

Linux - How to change default application for text files with custom extensions?

I do some creative writing and use PyRoom for most of my drafts. I want to save my drafts with a custom extension story(i.e. Persuasion.story) and associate story extension to PyRoom. I want to, ...
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1answer
18 views

Is there any kind of file that can hold calendar information (appointments or so)?

I am looking for a type of file that can hold calendar information (such as appointments) and when opened by a calendar application (such as outlook or similar apps) either on desktop or mobile it ...
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0answers
2k views

Virus changed some folders and files' extensions to .exe

A virus changed all folders and some of files on my USB flash drive to .exe files. I scanned the flash drive with USB Disk Security and scanned my computer with Microsoft Security Essentials, deleting ...
2
votes
3answers
9k views

reset file associations to default (idx opens w/ winRar)

Does anyone know how to set file associations back to default on windows 8. Currently the file extention "idx" is opening with "winRar" & i want to reset it back to "unknown program".
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1answer
1k views

What file extensions does ffmpeg support?

I'm trying to extract a subtitle from a Blu-ray disc and it is an hdmv_pgs_subtitle. So I try ffmpeg -i file.m2ts -map 0:3 -scodec copy rip3/test.sub and get Could not write header for output ...
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1answer
1k views

How do I add file types to Windows 8 “File Associations”?

I am trying to associate .scss files with my text editor, but the file extension is not listed under Control Panel > Programs > Default Programs > Set Associations How can I set this ...
2
votes
1answer
289 views

Custom Windows Configuration Batch File

I'd like to configure myself a one-click configuration windows script. However, I really don't know where to search for the lines to edit in the registry. I've found some things (such as UAC ...
5
votes
2answers
258 views

How can I associate multiple context menu types for one file extension in the registry?

I want to add custom context menu options for certain file extensions (like .zip-files) for a program I'm developing. However on many (but not all) PCs my software is going to be installed on 7-Zip is ...
6
votes
3answers
1k views

What in the world is a .el8 file?

I am taking an online Latin class, and they gave me a video to watch. A .el8. What? el8? I have never heard of that in my life. It's supposed to be a video, so I tried renaming it to a .mov (Latin ...
0
votes
2answers
598 views

Remove a file extension case-insentively in Bash

I want to remove the suffix of a file by using basename in a Bash script. The command removes the suffix only in a case-sensitive way though. How can I remove a extension case-insensitively?
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1answer
1k views

How to make Internet Explorer not open extensions

So, I had been using Notepad++ to open many be files - say, .txt, or .log, for example. And that is how I like it. One day, though, internet explorer suddenly started opening them, which I most ...
0
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1answer
118 views

Video - How to open .a Video format?

I downloaded several files from Video-Sharing websites (Like YouTube and others) with IDM which is downloaded Completely. But the Extension of these videos are .a. I Changed extension to .webm, then i ...
0
votes
1answer
27 views

How to Edit an non-extension Picture?

I have an open source application that i can edit any files on it. Now i want to edit some pictures that have no Extension! (Just the picture name can shown). and when i open them with any ...
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vote
1answer
463 views

Setting default action for new file extension

I wanted to create my own file extension and set two actions possible to do with the file. Here is .reg file I created: Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\.dls\] @="DLSource" ...
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1answer
371 views

How to set the default program without the program's icon for an extension

This might not be the best place to ask, but how can I set the default program for an extension while using a custom icon handler from a dll? I used this tool to show an apk's icon in explorer. I also ...