Sorry about that delay, I’ve replied to your ticket.
I’ll summarize it here as well.
With Blokada 6 we are using Google Play for purchases. When you purchased Blokada Plus through our website or Blokada 5, no active subscription will appear on Google Play (but you can still use your account by restoring the account ID in the app).
It’s not possible to migrate the subscription into Google Play automatically.
If you want to switch to Google Play, you can wait until your current payment plan is due and then subscribe through Blokada 6 instead.