note: I'm using the steam client, figured that question might come up. So I got a bigger monitor and when I was re configuring the settings to the new resolution I ended up making the game window too big for the display. so now I can't reach the settings or any other thing in the upper part of the main menu. I'm assuming it's a file saved locally so I really just need to know where to find it and what it's called so I can just delete it.
Delete the following folder: C:\Users\YourUsername\Saved Games\MechWarrior Online\Profiles\YourCharacterName