Changing the board to the mentioned one and only verify "Blink" program gave the same result: 0 bytes to upload, so something have gone really south here. I although remembered that ST had updated the core program to 2.0, will test both the new and an older 1.9.
My antivirus program normally ask if it should quarantine a files at install, but nothing was asked. I could see what files was put in quarantine but there was only one file and it was after that had been released that the verification as such started to work.
But I will get back after its done and tested and hope for the very best because something isn't right here.