Hi Luca - Thanks for the great questions.
We store the data on our secure servers so that you can access anywhere you have an internet connection. Only you have access to the data. The only way someone could get access to your data is if you provided them with the data we provided to you when you signed up. We simply store the data for your convenience and you have full rights to it.
The data is also stored on your local computer when you download using the ICMA Viewer. If you look in the directory under your "My Documents" you will find a folder called "icma". Each file is an XML file that can be read into several programs such as Excel or Microsoft Internet Explorer. We are working on a way to export the data into a CSV format.
On the fees we have been allowing everyone to continue using the application so we can get as much feedback as possible on how to improve. Currently we do not plans to charge and if we do in the future it will be a nominal fee to cover our expenses. If you choose to not continue use we can easily remove your files from the server.
Hopefully this answers all of your questions. If not, feel free to post again, or you can get to anyone from the Livio team at firstname.lastname@example.org
Best regards, Terry