Here is Marek again, as promised. The version offered by you, Therube, seems to work fine – to some extend

All buttons, check-fields respond corectly, various forms of the presentation of scan results, file move/delete functions, language settings etc. work OK. At that point any user asks and tests programme to check how confident he/she may be as regards the output of internal functions. I tested and hope that byte-by-byte file content search with all other settings left to default and compare method set to "compare only files between different source folders" does its job correctly. However, an attempt to compare images at 95% similarity level returned really astonishing results. When I opened and set the programme to show images collected in a group, I found three images as different as they can be. The only one thing they had in common was that each of them presented a landscape! I took screenshots showing that group images and programme settings that produced such results. If you were interested, I may, of course, post the screenshots here, but did not do so because as a novice on this forum I am not sure if that would be proper.
Anyway, I do, I mean, I really do your effort to help me and I assure you, you did, while other matters rest with the programme as such.
Cheers,
Marek