To save the data that you have entered into the internal synapsen database so far, it is sufficient to call the backup routine there via the menu item Info|Database. This creates a file with the extension .hsql, which contains all data in the format of a hsql database. Or, to be on the safe side, it is recommended to create an archive from the directory “syndb” in the working directory of synapsen via “zip” or a similar packing program to store it in a safe place.