First, note that I have Folx PRO and it's working fine. But I think Eltima should start referring to Folx PRO as Folx 5 PRO. To the purist with decades in the computer industry, it looks like they are two distinct products. Using Folx 5 PRO at least gives some indication that you can take F5 and turn it into F5 PRO.

Then there is the Apple App Store, which shows folx, folx go, and folx go+, and then the app page shows GO and GO+ side by side, with no clear description of the difference and the screens look much the same (as they are, since one just has more features, but still...).