The last couple of updates won't install for me. When I click "Launch" after installing the update, it opens a file explorer window instead of the game. Opening the game shows the version that I had when I first installed the game. Any other way to update it? I'm on Windows and I've tried running the update exe as administrator, didn't change anything.

1) There was a problem a long time ago with a particular game (don't recall which) where it bugged out if you launched from the installer. I decided never to do that again, haven't, and recommend the practice.

2) I'd do a search for the game exe on your computer to make sure there is not more than one installation. Uninstall all versions you find. Start over with clean install from installer you are certain of. If you still get an older version of the game than you expect, then your installer is not what you think it is.