I see the screenshot you attached has 320x240. Is this after you tried to restore from hacked state? Or before?
I had one hack try failed as well. Not with your reported problem, but I also had some strange things.
In my case, I literally reversed every step from the hack.
I deleted every file copied during the hack (all steps in reverse order) and copied back the original respective files from the backup I made.
Including putting back the original config file as the last reversed step. (I did not try to copy back the complete backup, just the files replaced in the hack steps.)
Then did a hard reset (holding the ON button for 7 seconds and removing the battery for 5 minutes).
This got my E4 (non WiFi) back to its original state, resolution and menu structure.
If you get to this point and the screen is still messed up, I can't think but the problem lies in your hardware having a failure somewhere.
Also, I think if you get to this point, there should be no trace in the E4 that would alert a FLIR repair service person you tried to temper with it by installing a hack.
And you could choose to return it (we have a 14 day money back guarantee in Europe, not sure if you have such a thing in the US), or send it back in for repair.
Be aware though, there is a new firmware out (3.12) that the hack does not seem compatible with. Chances are, that if you send it back for repair and get it returned, they put firmware version 3.12 on it.
I hope this is of any help for you..