Downloaded and installed.I downloaded it but am waiting for someone else to try it first. Also, I don't know what MSEB is.
The Google Play popup is no longer happening however I'm not able to update any apps via the Play store as I get the 507 error that I was getting when the issue started, still the same after factory reset as well. I am waiting for the Playstore to update but it's been about 30 minutes and a few reboots and nothing yet and the device is still "uncertified".
Hiby 3.0 player is much better functionally than the older version we had. Haven't had time to see/check on audio changes and/or MSEB/Equalizer changes but so far from just working with the device it seems a tiny, tiny, tiny bit more responsive. The keyboard is a little better on the right side as well, not by much but enough not to piss me off as much. lol
All in all don't factory reset your device unless you are able to update your apps via the Playstore. As a straight player it's working again, as an Android device it's missing some core functionality, so if you use Spotify or Tidal make sure to see if you can update them or download any app before you do any factory resetting.
Hopefully other people don't encounter the same issues I did and work fine!