This dialog provides authentication at the MYSQL database in www.atpdraw.net. ATPDraw version 5.8 offered registration at www.atpdraw.net. From version 5.9 this is instead performed at the web-page itself. The registration in ATPDraw is then simply email&password confirmation for quicker access to the web-page and the upload/download options.
Important! You should never use your secret password (bank account related etc.) in a web-system like this. Even if the password is stored encrypted (hash-coded) on the server it is given in plain text in the atpdraw.ini file. If your computer gets stolen the password could be identified. You could also easily forget to Unregister when returning a borrowed computer etc.