Hello David,
Thank you for your message.
Could you please clarify if you're getting any error messages when pasting the license key? For example,
Invalid registration key?
Please try referring to this KB troubleshooting guide:
https://www.remoteutilities.com/support/kb/invalid-registration-key-when-registering-remote-utilities/Also, please note, that if you copy the license key from some mail client, like Outlook, the formatting of the key might be somehow corrupted. In this case, please try copying the key from the downloaded txt file that you received to your mailbox.
Please let me know if the issue persists.