The first thing to do is to reinstall the application. Since it's a modem, it doesn't require additional configuration. If that doesn't work, right click the executable file and select Properties > Compatibility. Choose a previous version of Windows from the list and then tick the Run as Administrator. Launch the software this way. If it previously worked, then this procedure will restore their functionality.
Make sure that you have the latest Visual Runtime C++ and NET Framework installed on your PC.