Installing Gliffy manually
On JIRA Server or Data Center, users with JIRA admin rights can perform a manual installation of the Gliffy plugin. This is useful if you are unable to perform the automatic upgrade (see Installing Gliffy automatically) or if you want to revert to an earlier version of Gliffy.
1. Download the Gliffy for JIRA plugin JAR/OBR file from the Atlassian Marketplace listing at
https://marketplace.atlassian.com/plugins/com.gliffy.integration.jira/versions
2. From the JIRA Administration menu , click Manage Apps.
3. Login with your JIRA credentials.
4. In the sidebar, click Manage apps.
5. Click Upload Add-on.
6. Click Choose File and browse your computer for the Gliffy for JIRA plugin file you downloaded in step 1 and click Upload.
7. The plugin is uploaded to JIRA and is automatically installed. Check the Manage Apps screen to ensure that the plugin is available and to manage your license.