I tried to resume a project by opening the associated .mlt and got the message “Can’t find %luma22.pgm”. A file name that begins with % is generally bad news. There is C:/Program Files/Shotcut/share/mlt/lumas/NTSC/luma22.pgm but didn’t fix the complaint.
It’s possible (likely??) that the .mlt was created by the rev. prior to 17.10.2. I updated to that rev. last night. And that may have broken things. Or not.
I’m going to file this note as a bug, too - maybe it is, maybe it isn’t.