I doing misssetting for hotspot rb750, and now i can't winbox or ssh to router. when i type 192.168.88.1 appears hotspot login. i already reset the box, but still login to hotspot. how to flush the configuration to revert back default.

try to login with user admin in the hotspot, as if you used the setup for creating the hotspot it also offers to create a hotspot user. Then do a system reset.