We have 2 different verions of Jira installed.We are planning to copy compatible licensed plugins of jira 7.11 to 7.12.3. I could not find the licensed plugin jar files in jira 7.11 under /localapp/atlassian/application-data/jira/plugins/installed-plugins. Can you please let know the location of licensed jira plugins.
Plugin .jar files do not change because they are licenced. They are added to <jira home>/plugins and stay there, whether unlicenced, evaluated or fully licenced.
It is safer and better to use the "add add-on" functions in the UI than to mess around with files and directories though.