1. Now you can send invitation message to mass users at once.
2. You can filter online visitors who are connected to website only. Using nodejshelper extension this gives live view who is connected.
3. Canned messages now can be assigned to more than one department.
4. Private messages between operators will have a sound now.
5. Canned messages import/export will support tags now.
6. Users import will have more fields to prefill now.
7. Department list will be sorted by same order as in the widget filters.

For update just follow standard update procedure For manual update it's update_246.sql