fine here no problem
You might double check that Date Execution Prevention is turned off for DVDFab, i switched my settings to all programs one time and DVDfab would not start at all.
Web site says it works on Win 7 32 and 64 bit. You must have a problem.
Uninstall. Clean registry defrag check for virus etc etc.
Do a fresh install of DVD Fab 8. Be sure you enable all administrator pips.