There was a 15 second delay before the program opened. I closed the program, waited a few seconds, and launched the program. It took about ten seconds, but my new key was accepted finally. Then I opened the program and went to Options > License Key, and entered my new key. Each launching took no more than a second. I opened the new copy of the Free edition ten times. When the standard installation completed, there was a notice that my trial had expired (as I expected would happen, despite my efforts to wipe all traces of CC from the file system, the registry, the Task Scheduler, and my User profile), and the program opened in the Free edition. Well, I downloaded the Pro Trial edition after cleaning up everything I could find related to CC. I'll try to get another Pro trial today, after I clean up every known trace of the current and past installs. Entering a valid license gives ANY version the Pro header.

Every time I see the Free title, I feel a little like a freeloader, but the Professional title puts my mind at ease, since I couldn't have it up there without having a valid license. The Portable as Pro bit is just a 'that's just me' kind of thing. The next start took 15 seconds to get to the window. I tried a Pro trial yesterday, with the standard installation, and it loaded and worked just perfectly until I went to Options > License Key and entered my current key. I'm not poor, but I hate throwing money away. But I think that if I used a different key and it didn't break the loading process, I'd have a case (maybe) for changing my current key or refunding my subscription for that key.

TBH I'm not sure why you'd want to run Portable as Pro, most of the Pro options/features only work with an installed version. That wouldn't/shouldn't work if you have already used a trial on that machine though. If you want to keep trying things then you might be able to get a Pro trial if you completely uninstall the existing CCleaner. (And then might have more of an issue if you wanted another refund).

If you use a different email then as far as the system could know you are a new customer.

With the new licencing system, as I understand it, you'd need to use a different email address to get a different key.

Ccleanerkey