Occasionally during a windows update (most recently in the case of updating to Windows 10) files that ProCal-Track uses can be overwritten and deleted.

One such file is the driver for the licence dongle.

To re-install the dongle driver, download the installation file here : http://transmille.net/ProCal/setupdrv%20Net.exe

Please Note : This is NOT a substitute for a full installation of ProCal-Track on new computers, this utility is designed to add/replace files that may have been modified during updates to your computer.