This happened to me I did not read all of the above but,,, I stored the P6INSTzip on another partition(F) but installed it to another (C). Poser could not find it's elbow. And I got all those "please finds" and "open with" prompts I cut and pasted the installer to (C) and dumped P6 then reinstalled. Consider this only if you did something similar. Save new work in a safe place 1st. It's a pain.