unable to confirm the license you have reached the maximum number of activations ....

hi
I had to install Parallels 9 on a new Mac, el capitan.
Unfortunately I got the message: unable to confirm the license you have reached the maximum number of activations ....
this Solution is not working: https://kb.parallels.com/123461.
i dont have a button with "Activate on This Mac".
i have parallels desktop 9.
how can I disable the license on the old Mac?
I would be happy for help.
Thanks

 

Hey, your key has been reset, please check the activation issue now.
And plz don't forget about Parallels Desktop and MacOs compatibility.

 

it worked! thank you very much. i'm very glad. Thank you very much, very kind!
regards Daniela