...
After generating the license key, all you have to do is access the Administration-> Plugins section in your JIRA instance and paste the key into the corresponding plugin textbox.
Using an older version of the Universal Plugin Manager
If you are using an older version of the Universal Plugin Manager, we provide a custom page in Kepler General Parameters -> Licensing where you can install the Atlassian License. After installing the plugin, you have a 30 minute grace period to access the Licensing page and enter a valid license. If, however, after 30 minutes you do not have a valid license (Kepler or Atlassian) the plugin will disable itself.
Kepler Licensing
The Kepler license is a binary file (usergrouppicker-pro.lic) which must be placed in the <JIRA_HOME>/kepler folder. You can either generate and download a free evaluation license by registering on our site and accessing the Licenses section, or you can purchase the plugin by following these instructions.may obtain this file contacting cPrime support team
You can view details for your kepler Kepler license by accessing the Kepler Licenses page from Kepler General Parameters -> Licensing menu:
...