In content sign up for Mailpoet 3

Hi, I’ve been using Mailpoet 2.o ‘premium together with the in content sign-up forms from Magic Action Box. That works like a charm but now I want to update to Mailpoet 3.0.

Mailpoet 3.0 doesn’t work with Magic Action Box. I can’t find a way to get the MP 3.0 sign-up form in content. Do you guys have any suggestions on how to fix this so I can make the leap to 3.0 premium?