Bruno,
Your database is buggered, mate. Close Zoombrowser. Open Windows Explore, and go to:
c:\Program Files\Canon\ZoombrowserEX\Database
Delete all of the files in that folder that end in IDX, ZST, ZBD and DAT
Open Zoombrowser. It will give you a nasty message, saying that there's no database, and zoombrowser will now close. Open it back up, and cancel the 'Open Database' window. Go to File, and Database. Click on New Database. Click on continue, and then browse to the same location of:
c:\Program Files\Canon\ZoombrowserEX\Database
Type in a name for the database, and click on OK\SAVE.
It will then ask for an image library. By default, Zoombrowser keeps them at:
c:\Program Files\Canon\ZoombrowserEX\Image Library one
OR, it may be in your My Pictures folder, under My documents. If you want any other image folders, just go to FILE and REGISTER IMAGE FOLDER.
You should be sweet from there!
Mitch.