You don't see that listed in Program & Features as its entry is missing from
This is what I do when nobody is rushing me :)
Remove every entry for the software from Windows installer by searching the following registry keys
Remove files associated with it from disk from the following locations
Restart the computer and installation of another version should be fine
You can also use Windows installer Cleanup Utility to remove the software entry from Windows installer.
Don't forget to run the software as an administrator and remove files from disk if you want a cleaner setup as the tool doesn't remove them.
Disclaimer : Windows installer cleanup utility is a Microsoft tool. MajorGeeks is just a trusted download source I use and I am not associated with them