TBH. Doing anything on the DX is ass-twitching at best without a serial cable.
READ: DON'T GET IT WRONG!
or - have a serial cable to recover the mess..
I have a DXG 2.5.8 but there is no need to guess.
Go get the code? Amazon kindly provides copies of all the relevant things on their site.
You can find the configs lying around
(top sticky for links)