Thank you for your reply.
That is the version copied right off my Help/About. Ok looking at my download it is 3.6 on the file, About has v3.6 Build 3.36.3158.... I had copied the Version 3.3x from the bold part below.. my bad.
Program is working now, go figure. Since I downloaded in August I have just fired it up and it works. Same as I did the other day when it didn't work. I have a daily routine I do daily with the images for making patterns for my art work that is the same, I am like a robot so unsure how I could have done something to trigger it not working. I'm thinking the computer was having a few bad days as since I originally posted it hasn't worked, but just now giving it another try, it worked. And as I always do, open PDN, open file (one of the above that didn't work) choose erase.. works, paintbrush, works.
Is it possible that opening a file I've never opened that a setting was still in affect from the previous time I used PDN, so each new file would have that setting.. thinking of your suggestion of selections. My computer is always on but thinking that shouldn't make a difference. I'm quite baffled. But happy it is working and I thank you very much for your assistance.
NA