First of all, an option to view offline messages and delete them is available in Live Chat PRO version.
- Being logged at your wp-chat.com account, move to Offline message area (click on offline messages in front of the necessary website)
- You will see a list of all offline messages. In order to delete particular messages, check them and click on “Delete selected”.
- If you want to clean the whole offline message history, then check all chats and hit “Delete selected”.