I came across this post because I am having a similar problem.
I have been using PagePlus in various versions for many years, and am currently using PagePlus X9, which I have had installed since at least 2015, I think much longer.
I have just bought a Windows 11 Mini PC, which does not have a DVD drive, or any drive at all.
I would like to transfer my (totally legitimate) copy of PagePlus X9 from the old computer to the new one. I have my registration code, but I haven't been able to find the DVD after all this time. Is there a way to do this transfer? I have so many .ppp documents that I have created using this excellent software, that will be difficult to port over.
Thank you,
John Elliott (I was registered with Serif on my old email address, which is now closed, and I can't access it.)