Reset option failed to work under debugging section

-Project Information
.Repository
https://github.com/rparkins999/CalendarTrigger

Project Name: Calendar Trigger

Expected Behaviour
When reset option is click under debugging section,the settings should be resets

Actual Behaviour
When reset is click on ,it does not have effect in the application

How to reproduce
Download and install from fdroid
Run the app
Select three dots on the right side and then select debugging
Click Reset

.Browser:Calendar Trigger v2.0
.Operating System: Android 7.0

Recording of the bug

Github Account

https://github.com/adisalat2

Link to the issue report on github
https://github.com/rparkins999/CalendarTrigger/issues/11