Does your system use a strange native resolution or something? Seems weird that it was just a res problem.
You might be waiting a while on that authorization/approval. I doubt they've got time to spend with something like that. From what I understand though, it just edits your config files, so it shouldn't be a problem. I would think that at worst you might need to reinstall the game.
That program actually creates an Autoexec.cfg in your Brink base folder, so if there is indeed a screw up, you can either start the program back up and change back whatever you changed that caused the issues, click on the reset to defaults within the program or just delete the autoexec.cfg from the brink base folder and start fresh on the settings within the program.
It is a good tool and I approve of its use,