How to change activation message?
Please do these steps
1. Go to your FTP, and go to folder "wp-content/plugins"
2. Create a PHP file there and name it with "bp-custom.php". But if you already have it, you don't need to create a new one. Just open it
3. Put these snippets on the file
4. On line 7, please change 'type your new message here' with any text you want. And then save the file.