Yes, I frequently check for the latest firmware update. It's up to date.
Shrink is not open after it "feeds" the iso to DVDDecrypter or ImgBurn disguised as DVDDecrypter.
And lock exclusive usage is always on (I've always liked the way DVDDecrypter does that).
And I guess no one else has reported this.
By the way, LUK, DVDDecrypter was an excellent program. Was sad to see it go, but happy that you've maintained the burn engine, which I find better than the few I've purchased!
My problem may be elsewhere in the system then. If something comes up on this issue let me know.