Ugh - I've never had this problem, but I seem to recall someone else that did and it sounded like a poor connection at the OBDII port, or a faulty OBD cable, possibly poor connection at the back of the Gryphon, or, a "loose" fuse for the cigar lighter/OBD power supply.
I'm really puzzled by the unit "resetting itself back to stock". I can't see how it could do that without changing the program in the PCM too.
Finally, if you can't change the display colors, it sounds like you COULD have a defective unit.
I'm afraid this is a job for "The Mad Doctor"!
- Jack