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 15.6.3 This release - when loading a malformed User-defined Command Sequence from a file, informs the user rather than generating an errorlog.txt file entry - displays correct frequencies in the explanatory popup in the Spectrum-Waterfall window's DX callsign area (tnx to Chuck WS1L) - ignores the incorrect "change frequency command" sent by WSJT-X when double-clicking a Spot Database Entry causes a change in transceiver mode (tnx to Greg N9GB) - prevents "rig control error" reports from WSJT-X when responding to a CmdSendTX directive, eliminating the need to configure the WSJT-X "Split Operation" panel to "Fake it" (tnx to Steve K2SN) - when controlling an Icom IC-7300, doesn't flip the positions of VFOs A and B in Commander's Main window when switching between RX and TX (tnx to Norm KC1BMD) - when controlling an Icom transceiver with the Spectrum-Waterfall window displayed and a band change occurs, sends the Reference Level for the new band/sub-band to the transceiver after it has QSY'd to the new frequency (tnx to Björn SM7IUN) - when controlling an Elecraft K4 connected via to your computer via TCP, displays the Spectrum-Waterfall window with spectrum data from the K4's Pan A (tnx to Kevin K6TD, Brandon KG6YPI, Chuck WS1L, Zbigniew KU1T, Gordon N1MGO, Rick NK7I, Jim AB3CV, Lou W0FK, Ross K6GFJ, Alberto I2KBD, Bill NY9H, - closing the Spectrum-Waterfall window by clicking the X button in its upper-right corner closes the window and unchecks the "Spectrum-Waterfall window" checkbox in the upper-left corner of the Configuration window's Bandspread tab - when controlling a transceiver that supports the Spectrum-Waterfall window, CTRL-clicking the Main window's Bandspread button displays the Spectrum-Waterfall window - the frequency display in Spectrum-Waterfall display's upper-left corner employs the colors defined in the "Frequency Colors" panel on Configuration window's General tab - supports the Yaesu FT-710 (tnx to Carl WC4H) - when the Radio Model selector is set to SATPC32 or S.A.T., doesn't disable the Main window's Split checkbox (tnx to Dave N9FN) - updates the ChangingFrquency.htm, Configuration.htm, K4 Spectrum-Waterfall.jpg, and Monitoring Messages.htm documentation files Notes 1. 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 2. If this upgrade doesn't work correctly, see the "After an Upgrade" section of http://www.dxlabsuite.com/dxlabwiki/ApplicationStoppedWorking 3. A screen shot showing Commander's Spectrum-Waterfall windows when controlling an Elecraft K4 is here: https://www.dxlabsuite.com/commander/Help/K4%20Spectrum-Waterfall.jpg Commander 15.6.3 is available via the DXLab Launcher and via http://www.dxlabsuite.com/download.htm 73, Dave, AA6YQ