License issue upgrading from 9.x to 10.x

[PSi_101]

I've installed Plesk 9.5.2 (Debian) on a demo license in order to test the upgrade to 10.1.1, but the upgrade fails due to requiring a new license key.
How do I go about doing the upgrade with the demo license?

 

[IgorG]

Just perform upgrade with

# /usr/local/psa/admin/bin/autoinstaller --ignore-key-errors

and then request trial license for Plesk 10.x version from your sales representative.