If you're "Open With" menu gets too crowded for certain filetypes there is a way that you can clean this up. That is what I'd like to show you how to do today. My example today uses the .png filetype. You'll need to use a bit of logic here and replace .png with your desired filetype.

You'll need to open regedit and browse your way to [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts]

From there you'll want to find the folder which contains your filetype (.png for me) Then in that folder you'll see "OpenWithList" under the data field you will be able to see a .exe filename such as mspaint.exe right click the one that you don't want on this menu anymore and remove the key. After you're done with this you will probably have to reboot or log off then back on. As with all Current User keys this only affects the current user.

Some people may have to go to HKEY_CLASSES_ROOT\.png and remove some things there. That should be a global setting but it may not exist in single user environments.