Error 6 (whatever that means) unable to open old Photoshop Elements

[robertp84930905]

I have Photoshop Elements 8 on a Mac mini. I bought it when I had another computer. I have used it on this mini, but recently had all files removed and a new OS installed. I re-installed the Elements program. Today I tried to use it and got a message saying it could not be used, something about license and gave a helpful "Error 6" message. I chatted with an Adobe help agent who gave me a link to a download page for Elements, but not instructions. I downloaded a copy of Elements 18 (I think). When I clicked on the Elements Icon (I only saw the old one), I got the same message. Now I wonder what I need to do to get the new software to mount.

[robertp84930905]

After an extended exchange with Darshana Nimawat, an Adobe Agent, they sent me to the Forum so an "Adobe Expert" could help me. Please help me Adobe Expert or about anyone who knows more than I do, which is a lot of folks.