As I could not find a better place for my suggestion although there is probably a better place I´ll post it here: I found out that ScreenshotCaptor remembers multiple hits of PrntScr. Like 10 times in a row within three seconds, which is a great feature anyway. The only drawback is that ScreenshotCaptor stops taking screenshots as soon as the screen didn´t change and displays an error message instead. Which happened only once, although I´m using ScreenshotCaptor a lot, maybe 1000 shots or more within four weeks.
I´d prefer ScreenshotCaptor to continue taking screenshots. Maybe add an error message to the screenshots, but not stopping.

@KodeZwerg: I certainly could handle your proposal, with some effort. But before I try: Is it very likely to work at least? Of course, in the end nobody knows. I do not demand a guarantee. I surely got the latest Versions of Windows and Captor.