Under macOS the working directory of synapses is located in this directory:
~/ stands for the user-home directory, e.g.
/Users/anton/, if your user is called “anton”. In this case you switch to the syndb folder via the terminal with
cd ~/Library/Application\ Support/Synapsen/ ls -la syndb zip -r ./2018-12-31-backUp-Synapsen.zip syndb
to view the database and make a backup copy if necessary.
Windows und Linux
Under Windows and Linux, a separate folder called Synapses is created in the program directory (or where you specify it during installation). Here you will find the program files, but also the database with the literature data, in the subdirectory