1. Option to enable only one logged user under same account in settings/settings.ini.php
   Please add under "site" section 
   'one_login_per_account' => false,
2. Automatic translations kept recording old translation settings.
3. Visitor will be able to see chat for rest half hour once it was closed.
4. Responsive logo
5. Collapse expand right panels
6. And a lot of other internal small changes.

For update just follow standard update procedure For manual update it's update_108.sql