I purchased MMW 3.92 version, and according to the official site "You can install each purchased software license on up to 3 computers at a time". The program was installed in my old computer and when I asked for a new unlock code for installing it in my new computer the code was never sent by support. They said I could use MMW 3.94 "full" version (which does not require an unlock code), but that version does not work properly. I sent several e-mails to support service but received no answers at all. Should that be a honest software I would receive complete instructions on how to install it "on up to 3 computers" with a single unlock code - or supplementary codes should be sent by e-mail.