basically, the size byte field is wrong.  Run the second command again, but add a -r option.

Then, run the second command again, but a -f instead of a -r, and a "TWHG2.8xk" instead of "TWHG.8xk" and zip both those files up with the original "TWHGEdit.8xk" file and attach them.

EDIT: make sure the -r and the -f are case sensitive.

rabbitsign.exe -r -k 0104.key -t 8xk -o TWHG.8xk TWHGEdit.8xk

(actually, the "-k 0104.key -t 8xk" is unnecessary)

In this case, you want -r, not -f (rabbitsign is complaining because there's a lot of empty space after the end of the app, probably because you transferred it from the calculator, and it didn't have a correctly formed signature to begin with.)

the reason I said -f is it compiles while ignoring errors.  yeah, the -k -t is unnecessary, but I figured it couldn't hurt.  Also, it shows him how to use prompts with 010A.key and so on.