Hi,
I want to get a license for a marketplace application that I developer & published.
I previously had the app installed, and now it shows up with a "Subscribe" button on the Manage Apps page:

When I click subscribe, a new page with a popup opens, but I can't subscribe because it tells me that the app is installed again and there is only a "Manage App" button. What can I do to get a valid license?
Re-installing the app is not an option, since I would lose my data this way.

Thanks,
Peter