JIRA Enhancer Plugin "Update" isn't available via Manage add-ons

Question

I was using this plugin before updating our JIRA to 6.1.4.  With this version of Jira I also was about to update the plugin to 4.3.3.  We paid for license renewal, and got the new date of 10/24/2014, however the Update button for this plugin is still disabled on the Manage add-ons page.  Please advice as of how to get the new version of this plugin.

Regina Stolerma · Answer

I got it resolved by going to my Atlassian account, retrieving License Key from the renewed license, then returning back to "Manage add-ons" and 
placing the retrieved License Key into the JIRA Enhancer Plugin license key field, and saving it by clicking "UPDATE".

Ubisoft1 · Answer

What about downloading the desired version from 'Version History' in the Marketplace plugin page and then install it manually via the 'upload' option in your Jira plugin page?