I have worked with other forum databases such as phpBB and myBB using only the databases to work out how they activate. For instance the physical activation of a user in phpBB is simply that changing of a 1 to 0 in the users table. I'm sure that table names make logical sense in this software. And if it's just a changing of a 0 to 1 then all I need to know is that table name and column name in which that occurs.As you don't own the software, the table names and fields will mean nothing to you.
There is a user state field which is updated.