Does it inject into EverQuest or risk a ban?
No. It is 100% external window management. It never reads or writes EverQuest memory.
Do I need MacroQuest?
Only for AutoLogin. Window management and manual launching work without it.
Does it store my passwords?
No. AutoLogin uses MacroQuest's encrypted login.db; the app never stores credentials.
How many sessions can I run?
As many as your hardware allows. Built-in Desktop-heap and Disable-HAGS helpers raise common ceilings.