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 15.3.4 This release - when opening a command sequence editing window, ensures that it is not minimized (tnx to Matthias DD7NT) - provide the option to interact with a K4 via TCP (tnx to Jim AB3CV, Gregg W6IZT, Mike N9YB, Gordon N1MGO, Lou W0FK, Bill N5TU, Max NG7M, Bill NY9H, and Tom NY4I) - supports a new FlexCAT radio model for use with FlexRadio Signature radios via a serial port and SmartSDR CAT (tnx to Joe K8FC) - updates the Configuration.htm documentation file Notes 1. A special thanks to Elecraft Engineer Kevin K6TD for providing me with a loaner K4 and performing initial testing of Commander's TCP support for the K4 2. Commander assumes that it is the only application controlling your K4; do not exploit the fact that multiple applications can simultaneously connect to a K4 via the local area network 3. The new FlexCAT option enables the use of SmartSDR CAT, which supports FlexRadio's SmartLink for remote operation; its available near the end of the entries in the Radio Model selector 4. Update your firewall and anti-malware applications to consider this new version of Commander to be "safe" - 0 of 69 antivirus scanners accessible via Virus Total detected malware - 0 of 14 antivirus scanners accessible via Jotti detected malware - submitted for online analysis by Microsoft Windows Defender: no malware detected 5. If this upgrade doesn't work correctly, see the "After an Upgrade" section of http://www.dxlabsuite.com/dxlabwiki/ApplicationStoppedWorking Commander 15.3.4 is available via the DXLab Launcher and via http://www.dxlabsuite.com/download.htm 73, Dave, AA6YQ