You've been extraordinarily lucky to get it running. The general advice is to keep a special Windows XP system to do it. But it seems that your luck has run out.
Here's the response in Adobe's help pages, but as you'll see, Windows8 isn't mentioned. PM6.5 must be knocking on 15 years old, i.e. ancient and obsolete.
Ideally you need to run PM on a WinXP or Win2K PC. It's pot luck with Win8, as you've found out.
Thank you sooo much. I found that I needed my Microsoft password to have Administrative privileges. Then 8.1 offered to fix a problem with
software not intended to run on this version. AND IT DID!!!! I tried to get it to fix my elderly version of Photoshop but sadly it could not be fixed.
Thanks again for your help. You saved me lots of $$$$$ and headaches.