Last database loaded into the program will be loaded at the next start of the
program. If you want to access another database, go to the database menu by
clicking on the "Database" button at the top left
of the toolbar, then click "Load" or use the shortcuts
CRTL + I.
From
the window that will be displayed after clicking the "Load"
button you can choose the database file you want to open. After the file has been
chosen, the following window will be displayed where you will need to login with
the database user and password:

Once authenticated, this database
will be automatically loaded at every application run.