Hi and welcome.
A possible solution for the plugins is to use the DLL files we keep on our download page. Be sure to NOT overwrite any previously existing files though, as that will mess up PSP. Here's a link:
http://www.simmerspaintshop.com/colours/tools.html
Now the registry error. Unless this is a known issue with PSP8, and a PSP user/member here recognizes it and knows a solution, I'm lost.
Since you are not sure on regedit, I'd not make changes there without exact instructions for a fix.
