How to upgrade the application after a new version is released?
To install the updated version, you need to first re-download the item from codecanyon and copy the new files on your web server. After that, run the same installation process as originally done. Note that you can keep your database intact with all of the data (you don’t have to delete and re-create it again). If you want the database to stay as it is, just don’t run uninstallation of the previous version.
If you want to feel more safe, you can always install the new version under a different directory (with the old one still working) and test it before finally switching.
Keeping current configuration and settings after update
There are some files and directories you can keep on your server when updating, so that your configuration, application settings and uploaded avatars stay intact in the new version. For that, upload everything, but those items:
(stores main configuration and database settings),
(stores settings from the Settings tab of the administration panel),
(stores your custom avatars).