Welcome to Webflake!
Go to Downloads, and then you will see the submit file button shown in the screenshot below.
PS. If you have access to the hosting panel, you can change the password yourself, assuming you have access to the FTP as well you can change the password of your installation by modifying the file "conf_global.php". I suggest using Notepad++ or a similar tool to "beautify" the file. If you don't have any tool of the sorts, search for " sql_pass " in the file. After that, it should show the database password in plain text after that bit. Hope I helped!