migrate self-hosting to managed?

Hi Hillel & Co,
I now had my IN instance hosted on my own server, but have no time ATM to go that path further, as I’d like to concentrate on my work.
So I’d like to migrate all my settings and data to the main (your) page. Is that possible? Could I just export the data using the (JSON) export function and import it online?

I’d nevertheless like to continue helping out with bug reports and translations as far as I can find time for that - I really think that you have created a really great software with IN.

Update: I tried to export JSON locally, and import it at my freshly created account - but almost nothing happens. After the confirm email, there are no companies, no invoices, nothing.
Is there another trick to do?

Is your self host install running the latest version of the app?