After some testing, I've found out that BusyWin uses local or remote connections to the MySQL or Access servers. You will have to define these when the company is set up. Since I was in the DEMO mode, the software doesn't allow me to configure practically anything. It just opens normally and informs me that I am in the demo mode.
If you have a license for this application, access the configuration options and make sure that the MySQL or Access server is running and you have the necessary credentials to connect to, then reconfigure BusyWin.