Thank you guys for this discussion, all good feedback. @garbanzo, I've noted all those items and added them to the list. Per the crash with custom filters, I'm guessing it's just taking a while to populate the drop downs. There are a number of issues with custom filters that I really need to address, so I'll be reviewing that soon.
@Lmagnus87, thanks for that suggestion. Unfortunately the goal is to maintain consistency across typical Windows applications, so it's important that the Exit item remains under the File menu, awkward or not.
Thanks for the clarifications @scree. I didn't know about the issues with right-clicking and selections in the list view; it sounds like this only happens with game details hover or when the side bar is closed?