You must allow BaccS to connect to the Internet at least once every 14 days. During this connection the program will check that you remain an active Plus package subscriber. During these 14 days the program can be used without an Internet connection.
If your Plus subscription expires or you cancel it, the program will switch back to Demo mode. In this mode you will be able to view and edit all your data, but, among other limitations of the demo version, it won't be possible to create new jobs and invoices (beyond the allowable limits).