3.9.4: Fix crash when adding widget, allow custom icons with transparent parts
3.9: Marked Android 7.0 as incompatible
3.8.9: App does not require root access for PIN/Password locks with Full Device Encryption enabled on Android 6.0 devices any more
3.8.8: Removed checkbox check for "lock method selected" when method is not supported on the current OS - on Android 6.0, the app only works with PIN & Password locks