I have had CTRL + J set to convert images to JPG for years. Now when I hit the hotkey, the image doesn't get converted. Nothing happens if I hit the Run button in the Command Editor dialog while a non-JPG image is selected in the source Lister.
I tried changing the hotkey in case there was a conflict, but that didn't solve the problem.
I can still open the Image Conversion dialog and convert the image from there, that works fine.