“Unlocked License” is similar to a "Provisional License” as it can be installed on any computer without the need for activation. The difference between the two is that while Provisional License can enable the ISV’s software to a maximum of 90 days, Unlocked License can enable the software also perpetually.
How to generate Unlocked SL?
-> Master Key upgrade for feature 8 is required
-> In Catalog – Products – Actions – Create New Provisional
Set License Type to ‘Provisional Perpetual’