1). If you are using Ignite Gallery version 4.3 or below, please download the Ignite Gallery component from the downloads page, and upload it using Joomlas extension manager.

2) Then go to the ignite gallery downloads page. At the top of your page, copy your subscription id:

3) Then go to the ignite gallery component, and choose the options button:

4) Then in the General tab, enter your subscription key, and choose save. *This option was added in version 4.4 of the gallery.

5) Now you can apply future updates from Joomlas update manager:
If you create multiple websites, you can use the subscription id on all the websites that you build.

6) If the update fails after entering your subscription id, please choose the "Clear Cache" button, and logout of Joomla, then login:

clear cache