Activation problem

When I install DRAFTSIGHT on mac I do not receive the activation mail on my mailbox.

Having already installed DRAFTSIGHT several years ago without activating it, the software does not even open, I can not use it.

I tried on several mailboxes the problem remains the same.

mac OS SIERRA 10.12.6 (16G29)

iMac (27 pouces, fin 2009)

3,06 GHz Intel Core 2 Duo