A month ago I separated the free version from the premium version, to align with WordPress plugin rules. the free one is stored on wordpress’ plugin repository and the premium on my server. Once upgraded, further updates happen as normal (just from my server)
So there’s an “upgrade” process to switch from free back to premium (from v5.0.0) onwards.
For the app to work you need to be on the Premium Version, which is currently at 5.0.16.
If you are using 5.0.4 you may well be using the “free” version. On the church admin main page, there is a premium module – if you click premium install, that will switch you over to the new premium version.
If you are having trouble, please get in touch via support@churchadminplugin.com and I can help you further. Please let me know the URL of the church when you do.
I’m in Holland this week – so Central Europe timezone, if my replies are delayed!