The OS X version has a 64-bit version. I would assume the Linux version has a 64-bit version. Why not Windows? The last posts I can find on the issue are from 2008. Their compiler wasn't 64-bit or ...
Eric Foote is considering 64-bit Windows servers for his growing base of 4,500 users. But he’s in no big rush to make the shift from 32-bit computing. His first target application is Presentation ...