The newest beta supports 64 bit.
Need to be a ODNT subscriber for that though.

It does? then why does this pop up on SDC when I click on WB6? (5.92[b].096)
[Please note that the betas for WindowBlinds 6 require Stardock Central 2.46 Build 154 or later be installed.] WindowBlinds is the first utility of its kind. It extends Windows XP and Windows Vista to have a fully skinnable user interface including the sidebar, taskbar and explorer shell styles. You can change the style of title bars, buttons, toolbars and much more. It gives you total control over your graphical user interface. Includes support for per-pixel alpha-blended skinning on Windows XP/2003/Vista (32-bit and 64-bit). WDDM drivers are strongly recommended for Windows Vista. [This pre-release build is 32-bit only]