DAT achiever stopped working. Help!

Okay, my DAT achiever stopped working!!!
I contacted the author (Mr. Fam), but since he's not responding to my messages, I thought I would seek help from you guys. If anyone had the same problem in the past, please help!!!

I bought the liberation key for DAT achiever like a week and had been using it fine until last night, when I was trying to take test #2. It was suddenly asking for a liberation key again when I opened the program. It says "the program is not registered." I bought the program legitimately from the site for $49.99 and this shouldn't be happening!! my dat is next Wednesday argghhghgh!!

I know there's a time limit for the program, so I checked my computer calendar to make sure that I didn't change time accidentally. I had been also using that program on only one computer, too..

Please, can someone help me with this?!!