Hey Rik!

We're currently working on improving compatibility across our existing add-ons. Presently Recurring and Fee Recovery (per next release) are compatible. When 3.0 comes out the forms page will provide a migrations system which includes informing the admin about any plugins that are not yet compatible. As compatibility improves that list will go down until everything is compatible.

In short, not all add-ons will be compatible when 3.0 is released, but it is our priority to continue rolling out compatibility during and immediately following the 3.0 release.

Thank you!