I haven't heard back from Xara yet and I've tried everything I've come across for solutions. Following an old article I found on xara's support knowledge base, I tried to register the individual filter dlls for pdf export, but this didn't help either.

As a temporary fix, I downloaded/installed the 32 bit version and it's working as expected. 64 bit is still not working despite many uninstalls and re-installs and reboots.