The first two crashes are from context menu extensions. Did you try blocking them? Is that what led to the third crash?
If you restart Opus, which type of crash message do you get, the third generic message or one like the first two where it mentions a context menu extension?
Does it only happen when you right-click certain files, types of files, or files in certain folders?
Just to confirm, did you try turning on the Hide Windows items on file context menus (shift overrides) option?
Finally, do you have any context menus forced on using the Filetype CONTEXTFORCE stuff? (If you don't know what that means then ignore this question as no menus should be forced on by default.)
The messages i get are listed in order, when I right click, I get the first one, when I close that, I get the second one, when I close that, I get the third.
I did try turning on that option (Hide Windows items on file context menus (shift overrides))