Prevent Jarvis Updating to Krypton?

How do you stop Kodi updating to Krypton on the Nvidia Shield?

A few days ago I manually uninstalled it. Spent an hour or so re-installing Jarvis from a downloaded apk and setting it up again.
Now it has automatically updated to Krypton without asking me.

How do I stop it doing that?

I know a lot of people have put a lot of work into Krypton but it doesn’t work very well for me.