Since Fab's unexpected server change yesterday, their Android apk no longer works & they haven't updated it yet. And they've mostly left us in the dark with no email communication or ability to even access their forums since they aren't sending out confirmation emails for signing up, but I digress.
Anyway, there's no way to manually change the host within the app's settings, so I went ahead & used an apk editor to switch the host to the new server address. You may also have to use the generic username & password they went you when you first signed up (titled: Your IPTV login details). That's what I had to do instead of the email/pass you use for the site login.
https://drive.google.com/file/d/0B6qV8NIBiiMMRTh6b3lLMlowRGM/view?usp=sharing
Enjoy! And lemme know if it works. Hopefully they'll update this app officially soon. I use it on my Fire Stick w MX because it let's me control the volume with the remote. Plus I like the layout & how each thumbnail tells me what's playing instead of having to highlight a channel first.