The "Reset diary" option is between the "Backup diary" and "Migrate from other app" options, making it easy to lose your work by mistake. I suggest moving it to the bottom of the list of options and separating it with a horizontal line. Also, if it doesn't already do this (I couldn't check), have it throw up a confirmation window before resetting. Thank you.
Diarium version: Version 2.9.84.
Operating system: Fire OS 8.3.1.9.
Device model: Kindle Fire HD 8 Plus (12th Generation).
