Yes. We follow Atlassian’s policy on extending app evaluation licenses obtained through Atlassian’s Marketplace. If you obtained your evaluation license key there, please extend it through the Marketplace. You can do this by generating a new evaluation license key on the Atlassian Marketplace and copying it into the app management screen, in the product’s Administration section.
Alternatively, if you remove your expiring evaluation license from the Universal Plugin Manager, the “Free Trial” button will be re-enabled, and you can generate a new evaluation license from there.