To install the plugin you need to logon to JIRA as a system administrator, and in the Administration menu \ Add-ons find our plugin by name: Calendar for JIRA and install it.
Licensing is the same for all our plugins.
30 days trial period
After installing plugin you will automaticaly get 30 days trial period. After that time you have to request a new license key. See instruction below.
Get License from Atlassian Marketplace
To get your license through Atlassian Marketplace you must request trial key or buy commercial license in JIRA\Administration\Add-ons menu.