Hey guys! New update: the log-in error I kept getting was because somehow Roon was still connecting to the internet. When I had my internet turned off completely, it finally went through the log-in/password, directly to the music folders.
But as soon as I connected to the internet, Roon would shut down back to the login page.
Hosts file numbers do NOT work for some reason, no matter how many addresses and 127 numbers I write, so I had to install Little Snitcher or Lulu to complete block all connections from Roon. This way worked!
Hope this helps anyone out there!