hi, thank you for your post!
yes, you do need to uninstall 0.3.1.1 or earlier before installing newer versions, as previous builds used a different signing certificate.
please make sure to backup your save data, as uninstalling the app will delete it.
save data folder for Android is located at /data/user/0/com.example.enterthenyangeon
unfortunately you may need root access for it...
i may add new resolutions in newer versions.