QNAP
To upload a file with a licence you have to login to Xopero Control Panel on your QNAP
and go to Licence tab, then click Select Xopero license file with *.lic extension field. Next, in displayed window you have to choose file with license and click Upgrade button. There is no need to delete trial version, just upload a license.
Backup&Restore
Same as on QNAP solution, to upload a file with licence, you have to login to Xopero Control Panel (the panel icon in menu start or desktop), and go to Licence tab, then click Select Xopero license file with *.lic extension field. Next, in displayed window you have to choose file with license and click Upgrade button. There is no need to delete trial version, just upload a license.