All you have to do is "re-register" gMax (Use the same email address as the one you used earlier on). After pressing register, the site will ask you to key in your password and all you have to do is copy and paste from your gMax registration information email they sent to you earlier.
P.S. May I ask what is the project you are working? I'm curious
DMK(TG773/772) PEN(SQ772/MH734) PER(QF333) PEK(CA763) HKT(MI320) HKG(SQ744) ICN (OZ333), CJU,TAE(OZ734) TPE(3K320) KUL(T