Click Check for Updates... command under the Help menu. It takes a few of seconds to check the update (depends on your Internet connection speed).
If the update is available, the latest change log will be shown. If you need the update of your copy DBF Commander Professional, click Update button.
After download is finished, the current instance of the DBF Commander Professional will be closed. Please ensure there are no other opened instances of the program. The downloaded installer will be executed. Install it into the same folder where you have DBF Commander Professional installed already. The appropriate path will be shown at Select Destination Locationpage of the installer by default.
Please, do not use DBF Commander and DBF Commander Professional together at the same workstation. This may leads to malfunction of some commands.