On my System running Windows 10 Professional, I am using Visual Studio 2015, which is the standard program associated to Text-Files, i.e all files with a suffix .txt, which means all files of this type are automatically opened with Visual Studio.
To use another program as default, I right-click a .txt-file, select "open with" and chose another program and tick the checkbox "always open with...". From that time on, my .txt files are opened by that other program (in this case PSPad), which is the behaviour I expect.
However, after I reboot my system, .txt files will reopen in Visual Studio 2015 again, which is not what I expect. So either Visual Studio 2015 itself, or some other process keeps re-assigning the defaul app settings. How can I permanently set PSPad as the default editor for .txt-files?