Hello,
Sorry to hear you are having issues. Have you review your activation and see it has not reach max count. If it does, you will need to deactivate old activation first to clear up the activation slot. Try this guide: https://forums.stardock.com/486311/accounts-and-activation-support-faq#reviewactivations. Report back if this is not the issue.

Thanks
Basj,
Stardock Community Assistant.

Just as a test if you try to activate using a pc that have internet connection does the activation work? You can deactivate it after the test is successful.

Thank you,

Basj,
Stardock Community Assistant

There were server down issue but usually it will be back up after few moments. But, I am not sure if your issue is 100% not working all the time?

Thank you,

Basj,
Stardock Community Assistant

Understood. Just to confirm. You have taken completely all the steps mentioned in this guide https://forums.stardock.com/486311/accounts-and-activation-support-faq#offlineactivation and you still fail to get Deskscape to activate? If all this true, than something else is going on, Account problem maybe.

Please raise support ticket using the link below, use "Ask a Question" option. Include all information details. Remember to record down the ticket number for future reference if needed. Do not raise multiple ticket, that will make your ticket back to the end of the line. Send once and wait. Ticket will be answer by the order they send in.

https://stardock.atlassian.net/servicedesk/customer/portal/4/group/13 

Thanks
Basj,
Stardock Community Assistant

Bizarrely this has now registered, however, in order for it to work I first had to download, install and register Deskscapes 10. Then, and only then did it permit me to do an offline registration for Deskscapes 11.

I have cancelled my ticket and appraised them of the resolution, thank you for your help.

Hello,
Sorry to hear you are having issues. Please refer here: https://forums.stardock.com/486311/accounts-and-activation-support-faq#keepsaskingactivation. Try that and report back.

Thank you.
Basj,
Stardock Community Assistant.