I'm sorry, but I have not understood how to install the Business version over the Free version.
I must uninstall this one in advance?
Or I can install B. versione over the Free version and the process save the data already present?
Thanks

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I've uninstalled free version and then installed B. version.
Now I have still all data.

Now it is Ok, but what to happen with the modules and whit upgrade?
In the Business version these are installed from component and if with an upgrade the modules are uninstalled, then I have always create and configure them newsly.

I've also noted that when I ask to download un upgrade, the component download a zip file with the generic name and so it is impossible to know if this is the same of the actual version or of a new version.