RE: Jeti 18 plus program
If you bought the ESC new, and did not receive instructions with it, please contact the vendor you purchased it from. They owe you a set of instructions.
As far as programming, I think the only thing you can change without the programming card is brake-on, brake-off. Unfortunately, I don't know the procedure offhand, but I do recall seeing it described in this forum recently, so it should be available in a search.