If you need to edit the Wrack's resolution but can't get to the settings menu in-game then you can edit the config which is located here: %APPDATA%\Wrack\Wrack-<user-id>.ini

After you open the config search for the following lines:

vid_screenwidth=
vid_screenheight=

I would recommend setting them to something lower than your native res. I set mine to 1920x1080 and was then able to go to the settings menu in-game and bump it back up to 3840×2160.

If you need to set it lower than 1080p then you can use 720p: 1280×720 or even 1024x768

It's a quick and easy fix, I hope this helps someone else out there.