As a player had become stuck when setting the resolution bigger than their monitor I have added a small failsafe option.
On the main menu hit the "9" key. This should set your window back to the default settings.
This is only temporary though, so be sure to go into options, make your selection and hit apply to save a new setting before closing the game.
Also I improved the resolution on some of the achievement icons a few days ago but didn't think that alone needed an update post.