If you are using Window Defender Antivirus (Windows 10), update it to its latest malware definition in https://www.microsoft.com/en-us/wdsi/definitions before installing or upgrading to Commander 15.5.0 This release - makes the "IP Port" setting visible in the "Commander Flex Signature Selection" window that appears when the Select button is clicked on the Configuration window's MultiRadio tab (tnx to Larry K1UO and Wray AB4SF) - supports connection to an S.A.T. Self-contained Antenna Tracker http://www.igatemini.com/sat (tnx to Dave N9FN and Keith AC2MI) - updates the Configuration.htm and Satellite Tracking.htm documentation files Notes 1. Update your firewall and anti-malware applications to consider this new version of Commander to be "safe" - 0 of 70 antivirus scanners accessible via Virus Total detected malware - 0 of 15 antivirus scanners accessible via Jotti detected malware - submitted for online analysis by Microsoft Windows Defender: no malware detected 2. If this upgrade doesn't work correctly, see the "After an Upgrade" section of http://www.dxlabsuite.com/dxlabwiki/ApplicationStoppedWorking 3. To track satellites with an S.A.T., see https://www.dxlabsuite.com/dxlabwiki/SAT_Interoperation Commander 15.5.0 is available via the DXLab Launcher and via http://www.dxlabsuite.com/download.htm 73, Dave, AA6YQ