How do you reset your unusable Homegroup after system name was changed?

[PathinAZ]

Running Windows 8.1 x64. I renamed my system and cannot log in to the my Homegroup. I created the Homegroup some time ago so I don't remember the password, and since the system name change it acts like I didn't create it (can't view or change PW).
I've spent hours researching this and can't find a resolution. Thanks.