WP X6: Runtime Error on Windows 8

I have just installed the trial of WP X6, and for the trial, I decided to have a clean install without importing my previous settings from X5. (I thought I could still do that later by uninstalling and then re-installing X6 with the import settings option selected in the installer.)

However, I am not able to run X6 successfully on my Windows 8 Consumer Preview installation. X5 runs wonderfully with Win8, but I cannot get X6 to work without this Runtime Error:

I know that Win8 CP is still a beta version of Microsofts's latest OS, but has anyone already had any success in running WP X6 under Win8, and what could I do to get rid of this error message?