ChrisGaming97

I cant activate it because it will say its been activated on 3 pc's already

So ive had malwarebytes and liked it for a while. I recently paid for it and need to know if i can get it back. I had it on the same computer that im using now but it had to get fixed and a new drive was put in it i still have the drive (well my files were copied from the old drive to a new one) and its on my computer as the 2nd drive is there anyway i can get back malwarebytes? i still have the setup or install files on the other drive. i have tried those files and they didnt work. Help!?!?