Question About Bots

I'm just a bit curious. What exactly is a dmbot file? Is it a custom filetype for Dark Mystic and others to read?

It's a custom bot file that works on some Bots like Dark Mystic or Le Bot.
The file may do a quest, kill monsters, get a special loot...

A DMbot file was introduced by dark mystic to save custom bots. This eliminated almost entirely the need for pr made bots to be on the trainer and for the trainer to be updated every time something was released on AQW. So the DMbot file in itself is just the save data for these custom bots and is used by Le bot and Dark Mystic.