You are correct. It is not the exact screen, but the same screen with the exception of mine that says “Welcome back to CCleaner”, but the problem is essentially the same I would guess. My Desktop (Windows 10) and my older laptop (which no longer works), for years had NO welcome screen, and yet now, my desktop still has no welcome screen, but my new Laptop (Windows 11), DOES. Other than the fact that it is a new install, over the last week, so was not installed on top of an old version, and the operating system involved….I don’t know much in the way of differences otherwise. To my quick evaluation, I think the settings within the Free version of CCleaner are the same on all three devices,, and most of the software, anti-virus, security, etc are similar on all three….yet only the fresh install gives me that welcome screen.
I would have thought that the pro version would not get the advertising on the right side of the screen, but I guess we all get that.
None of my versions are the portable version, as far as I know.