If you are using Window Defender Antivirus (Windows 10), update it to its latest malware definition in before installing or upgrading to PropView Pathfinder 5.3.5 This release - compensates for recent QRZ changes (tnx to Eddy ON5JK, Marv W5DT, Paul W2ECK, Dale AA1QD, and Jim W5ABA) Notes: 1. Update your firewall and anti-malware applications to consider this new version of Pathfinder to be "safe" Virus total: 3 of 72 engines detected malware Jotti: 0 of 15 engines detected 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 Pathfinder, see Pathfinder 5.3.5 is available via the DXLab Launcher and via 73, Dave, AA6YQ