I just installed and tested it on a couple of zips and it indeed does work as requested
. I also tested it on a non-scenario zip and verified (at least in this case) that it didn't put any of the extracted files into the scenarios folder.
For a "try to break it" test I did put a PDF file into another scenario zip and the unpacker renamed the PDF and put it into the scenarios folder with the three regular files. However, since it wasn't noted in the requirements that only those three files are to be renamed and transfered, I have no issues with extra files being put the folder.
It did transfer a scenario that was missing one of the three files. I don't have a problem with this, since jvankessel did nicely provide a window where the user can see the files before transfering them.
So in all a good job, jvankessel!!! Take another sail!!!