I have a danish version of Windows, but I will try and translate it at my best.
Open up My Computer.
click Tools at the top of the screen.
click Folder Settings.
click Show.
Uncheck "hide file extensions on known file types".
That should solve the extension problem and as far as the bots starting on my computer they are added automatically at the start of a round.
You can push the "p" button to get a menu with podbot options.
I Hope this helps you
MusicMan