Hey TheMysterio,
Try this.
Left Click once on one of the files that you want to change its association. Then, while holding the
SHIFT key,
Right Click (or just
Right Click on the file without having to highlight the file first and you shouldn't have to hold the SHIFT key)... Select
Open With within the option menu, and then find the program you want to open it with... Be sure to have the check box on the bottom that says
Always use this program to open this type of file checked so that it will hold its new association. You should now be able to see the new icon to the program you are now using to open that file.
Hope this makes sense and hope this helps you out some
Good luck!
-SlickVic78