I recommend that you back up your Library data file if you're going to try out either MediaStudio Pro or VideoGraphics Lab TBYB versions with VS9. The Library contains all of the video, audio, etc. clips that you've brought into VS, and includes any custom library folders you've created. Both of these programs latch a deathgrip onto the Ulead MPEG encoder, so when you uninstall either one they take the MPEG encoder with them. Needless to say the only recovery (if you have the ESD version like me) is to reinstall. I understand the box version has a Repair option which may work. Of course if you've saved all the SmartDownload files and the update packs the reinstall is a pretty painless operation.
So, should you want to try out either of the above programs, or just want to add the library to your backup routine (which I know everyone has

) your Library file is located at:
C:\Documents and Settings\YourUserAccountGoesHere\Application Data\Ulead Systems\Ulead VideoStudio\9.0\VS_Video.dat
Of course, it's probably easier to backup the MPEG encoder itself. It should be located at C:\Program Files\Common Files\Ulead Systems\MPEG
But it still is a good idea if you've created custom folders to have a backup. You just might be thankful you did.
Hopefully this'll help someone,
Ron G.
Wisdom comes from knowledge,
Knowldege comes from experience,
Experience comes from mistakes.