It is always a good idea to back up your data so that you have a safe copy of it in the event of a disaster.

To back up and recover your data

Copy the contents of the C:\ActiveReports 8 Server\Data folder to a safe location.
Install a fresh instance of ActiveReports 8 Server with the same version as the one from which you backed up your data.
Copy the contents of the Data folder into the new C:\ActiveReports 8 Server\Data folder. The data is recovered.