SCUMMVM Q&E should work fine after download, so i can't really see why you're having this problem.
But even if you are able to make it work, you won't be able to use your own savegames. Don't ask why, but scummVM doesn't load savegames that have been made without using scummvm and likewise you canot open scummvm saved games when not using scummvm.
Basically, use scummvm, not scummvm q&e and start the game again, that's the only way it's going to work. sorry.