Unable to Access "My Scores" private content

I have an older Ipad with Musescore installed, the ipad will only updated to IOS 10.3.3 , when bought and downloaded Musescore from the App Store I had a message that it would download the latest version able to run on my system, that was I think 2.7.1. Everything has been working fine but now when trying to access "My Scores" content I get a message that an update has occurred with changed security that I need to install before I can regain access.
My hardware/software cannot support the new update or any version higher than what I have been using.
What can be done?
Having to buy a new Ipad seems a bit extreme.