System Requirements:
Windows 7 / Vista / XP
CursorFX is not compatible with Windows 8
And although not officially supported on Windows 8, most users are having no problems running it on that OS. I've been using CFX on Win7/64 with no trouble at all since Win 7 came out. There was an earlier version that needed the CFX Control Panel exe to be run in compatability mode for Vista, but I believe that has been addressed, along with the need to double click to apply a cursor. You should be fine with the current version.
The spec/Data sheets are way out of date(2009) and contain Version 2.0 specs.