If you are using Window Defender Antivirus (Windows 10), update it to its latest malware definition in before installing or upgrading to PropView 1.9.9. This release accommodates changes made by the US National Oceanic and Atmospheric Administration: - the file that specifies predicted smoothed sunspot numbers has been changed from text format to JSON format - downloaded files should specify HTTPS rather than HTTP Thanks to Kent N6WT for engaging with NOAA personnel to determine what changed, and for testing the several new versions of PropView that were required. 1. In the "Prediction URLs" panel On the Configuration window's Prediction tab, 1a. the default "Predicted Sunspots Numbers" URL is changed to https://services.swpc.noaa.gov/json/solar-cycle/predicted-solar-cycle.json 1b. the default "Current Solar and Geomagnetic Conditions" URL is changed to https://services.swpc.noaa.gov/text/wwv.txt 1c. the default "Predicted SFI and A-index" URL is changed to https://services.swpc.noaa.gov/text/45-day-ap-forecast.txt 2. In the "Propagation Web Sites" panel on the Main window's Parameters tab, the default for the second URL is changed to https://www.swpc.noaa.gov/communities/space-weather-enthusiasts 3. the documentation file Operation.htm has been updated Notes: 1. Update your firewall and anti-malware applications to consider this new version of PropView to be "safe" Virus total: 1 of 70 engines detected malware Jotti: 0 of 15 engines detected no malware Microsoft Security Intelligence: no malware detected 2. If this upgrade doesn't work correctly, see the "After an Upgrade" section of 3. After upgrading, to revert to the previous version of PropView, see PropView 1.9.9 is available via the DXLab Launcher and via 73, Dave, AA6YQ