app keeps crashing when trying to open settings

Expected behavior

I tried opening the settings for chip8 so I can configure it, so I clicked more options button then the submenu showed up then I clicked settings so it can bring the setting features out.

Actual behavior

when i clicked on the more options button which is the button by the right and touched settings button then "chip8 has stopped'' pops up

How to reproduce

download
Launch chip 8,
clicked the more options button then select settings

Device Used: Infinix Note 3 or Infinix X601
Operating system: Android 7.0 Nougat
App Verison: 0.7 (1)

Recording Of The Bug