J!TrackGallery may be installed as any other plugin or components using Joomla extension Manager.
The link to the last version of J!TrackGallery may be found on our download page.
Go to your back-end (admin) extension manager to install, paste the package URL and press install.
We recommend as in any upgrading process to first backup your data to prevent any damage by unpredict behaviour.
Upgrading J!TrackGallery uses the same process as installing. Installing the last version will upgrade your current installed version without modifying your data (tracks, images…)