No able to use the licence code for trial version on Macbook

I just used my email to try out rhino 7 for mac, i was given a licence code for the download for the 90 days trial however after installing the software, i was unable to use the full trial as the licence code was invalid. anyone able to help in this problem?

Hi -

You can only have one 90-days trial period. You started yours on July 16th and that period has run out. If you found Rhino to be of interest in your work or studies, you will have to purchase a license to continue to use it.
-wim