Sorry, with it being a MAC I wouldn't know of anything else.

If it was windows I'd suggest moving your runtime folder to somewhere else, deleting Poser completely including anything in the registry, then re-installing, deleting the new runtime that the install puts in and replacing it with the original that you kept.
I know this works in windows, never tried it on a MAC though!

Injustice will be avenged.
Cofiwch Dryweryn.