There's a lot going on here! I have sent you an email with the IP the DNS record is pointing to. It sounds like there's a few questions getting jumbled here.
- Is your PC the PC at that IP?
- Is that instance of Mango the cloud connect server?
- Is that the instance of Mango that a password change attempt was made on, or a client connected to it via cloud connect?
- Have you installed it as a service on this PC (it definitely sounds like you have, which is why it is running when you start the computer)?
Whatever the resolution to those questions, this thread has probably the simplest method given access to the computer running Mango to change the password: https://forum.infiniteautomation.com/topic/2926/forget-the-password-of-admin-how-to-get-it-back