If you wish to have different data files that contain different accounts and pennames, here's how. This can ease your data management.
To create a separate data file, you can copy and paste your existing data.ad1 file into different filename e.g. "ProjectA.ad1" file. Next time when you want to submit articles for Project A, just drag the data file into" EdwinSoft.ArticleDemon.exe". That will do.
Otherwise, if you are using Windows Vista or Windows 7, run AD in admin mode so that AD can register the .ad1 filetype to itself. Once that is done, restart AD and next time you can simply double-click on .ad1 file to open them in AD.
The "admin mode" applies only to vista users who wish to register the .ad1 filetype. To run AD in admin mode, you can right-click on the shortcut of AD on the desktop and choose "Run as administrator". This will run AD in admin mode. However, you will need to have admin rights to the pc to do so.