Open up notepad and copy the following in to it:
Del C:\"Program Files"\"Our crappy software"\"file to be deleted.txt"
Save this as either a .cmd or .bat file.
Run it!
You can either double click or place a shortcut.
This will allow you to delete from anywhere, alternatively you can use:
Del "file to be deleted.txt"
as long as the working directory is correct, but it is best to use actual paths.
FYI - you do not need quotes for one word names, you just use them where there is a space, alternatively, you can use the old 8.3 file format (for example, go to command prompt and a directory with long files and type dir /x then you can use file~1 instead of "file to be deleted.txt"