The internal group chat feature usually works correctly only when the localhost webserver built-into TAD is run at port 9600. If you change the port, a warning would be displayed – as often group chats will not work correctly.

If you still want the group chat to be available, then you would need to locate the file echoe.bat which is kept inside the same folder where the main program of TAD is residing. Then edit the number 9600 to the number of the new port you set. It is written only at one location in that file.

Please do this carefully, as any incorrect edit to that file can break the group chat system entirely