Hi, my apologies for late reply, been a bit busy with irl work ;(
Just tested the beta, and the settings bug is no longer there.
Honestly the project is great, I wouldn't want to rush you on it as it's best to take your time and do it as you like it, people already love the first version as it's much better than anything out there, and most of the working epub readers on m5burner are Chinese only :(
If you need something tested or anything you can reach me via Telegram @L_470 or by email Danikrlop@gmail.com and I'll be happy to help out any way I can :)
Best of luck in your project and it's really an amazing project ^^