Hi Scott,
Thanks for the idea of uninstalling first, then removing the whole FM8 directory, then rebooting (otherwise, the installer thinks it is still running) and finally reinstalling. That worked. Of course, when uninstalling, all add-ons that were later installed with FM8 would have to be redone after a clean install.
Fortunately, I work on a virtual PC on a Mac, and I have first made a copy of the entire machine. All I had to do after reinstalling FM8 on the copy was to move the extra files to the original virtual machine. Now the DITA menu shows more interesting options than before...
Oh well, it keeps us off the streets... ;-)
Jang