Carl all versions of Xara applications are written for 32-bit Windows but work equally well on 64-bit systems.

I have Windows 7 64-bit on one of my laptop computers and all the Xara applications work very well on that system.

I asked if the CMX file type was in the export list to see if the CMX filter was registered correctly. When the filter does not register itself correctly it usually does not show in the export list.

Please contact Xara Support and open a ticket. http://support.xara.com