Consistent Crash Upon Opening App

App keeps crashing right when I open it (it pops up for ~1 second then goes away). Then it opens by itself and crashes again, only to repeat this process over and over. It started happening right after I changed the width of a button to a really small number of pixels (idk if this is related).

Crash reports below

BetterTouchTool_2019-08-24-152525_Glens-MacBook-Pro.crash (95.6 KB)