Zoombrowser opens in Windows 7 64-bit, but the directory structure does not link properly to your pictures, i.e. if the My Pictures folder is linked to a directory path not on the local drive, Zoombrowser does not see it. You have to hunt for it manually. This does work in Vista and XP.
Also camera window does NOT work to download your pictures, which sucks in my opinion, because I use it for the ability to rename files by date and folder.
In conclusion, Zoombrowser runs, but not to full functionality.