...

The order in which the licenses are checked is:

1. Atlassian LicensecPrime License
2. cPrime License

It is strongly recommended that you do not install both licenses at once, as this might yield unwanted results. For example, consider that you have an Atlassian License with the support date expired and one valid Kepler LicensecPrime License. In this case you cannot update the plugin, because the Atlassian License is checked first and its support date is expired.

...

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.
For more information see UPM documentation.

...

cPrime Licensing

The Kepler license cPrime license is a file (blitzactions.lic) which must be placed in the <JIRA_HOME>/kepler folder.

1. Contact our support to obtain this file. 
2. Copy the file to the <JIRAthe <JIRA_HOME>/kepler folder.
3. Ensure that JIRA has read and write access to the file
4. Restart JIRA.

cPrime License cPrime License Page

You can check the validity of our add-ons:

...

If you want to remove an Atlassian license that you no longer use, use UPM (for UPM 2.0.1+) or by remove the old license key and click Update.

To remove a Kepler licensecPrime license,  delete the correspondent .lic file from the Kepler foldercPrime folder. Note that any change to the Kepler license cPrime license requires a server restart.