It should remove any traces of studio from your system. I have studio 8 and it does not work well for me either, I have had to uninstall it several times and have had to use the Registry Cleaner each time before I can reinstall it. I too am looking to change to another programme for the video editing, I am getting hacked off with Pinnacle.. I hope the above link works for you..good luck.
Thanks for the information on Registry Cleaner. Sorry to hear of your Studio 8 problems. Have had Studio7 then upgraded to Studio 9. Both work like a dream BUT it did take a while to get things set up right. Why not start a new thread and get some help - should save you money in the end.