1. Message delivery status indication. https://doc.livehelperchat.com/docs/chat/#message-delivery-status-indication
2. Old chats will show messages as undelivered. Or you can execute query from update file.
3. This time it's recommended to run queries from `update_298.sql` to avoid database locks. If you have small db it's not necessary to do that. Make sure you know what you are doing.
For update just follow standard update procedure. For manual update it's update_298.sql
Developing application takes a lot of time. You can support application by donating. There is no company behind this application and it takes away my free time. Every donation matters and does not matter how small it is!