So my daughter installed the Windows S2 app on her laptop and it prompted her to upgrade - being an impatient teenager, she clicked yes and now I have an unintentional mixed systems, but the S2 upgraded units won’t downgrade in the S1 app on my iPhone or Windows machine - I’m getting Error 9 and the help page for this is completely useless. It says try again or run a split sytem. Try again doesn’t work and I don’t want a split system. On top of this, it’s not even clear why the app just let her initiate this partial upgrade without some serious warnings or didn’t ask for the primary user password. I don’t want a split system so how do I get these upgraded units to downgrade back to S1 without an error?