I upgraded from Platinum to VegasPro mainly for the Media Manager for my *.m2t file collection. I have since learned that ThumbsPlus (thumbsplus.com) offers the same capabilities and a whole lot more. Thought you'd like to know.
Thumbs Plus isn't really a database. It's a very nice graphical front end for your file system. Once upon a time it was the only game in town and I used it a lot, now you have the Explorer graphical front end in Vista and apps such as Adobe Bridge that give you similar functionality.