I’ve just released a new version of dbdesc for Windows XP x64 and Windows Vista x64. Even though the core of dbdesc is not tied to a specific architecture, some of the libraries that dbdesc needs (Firebird and others) are processor-dependent. So if you are running a 64-bit OS, now there is a specific installer for you.
Also some minor bugs got fixed in this version.
I’ve added the link on the download page.