Transfer licence to new iMac

I have acquired a new iMac and am unable to transfer my licence. How can I address this issue? Thanks.

 

Hello,
do you have an issue with Parallels Toolbox or Parallels Desktop?
We've checked your account humph***s.si**n@sky.com and found only Parallels Toolbox license.
Could you share with us your Parallels application license via the private message.
We will be glad to help you.

 

It is Parallels Toolbox. I will send a private message

 

We've made necessary changes with your key, please check the issue.

 

Unfortunately it is still not working

 

Please restart your Parallels Toolbox and check the issue.

 

It still does not work

 

Could you provide us with your license key please?