This release corrects a regression defect inadvertently introduced in DXKeeper 15.3.0 that results in a user who has never before executed the "Sync LotW QSOs", "Sync LoTW QSLs", or "Sync eQSL QSLs" function being informed that the date-and-time of last synchronization is invalid when they attempt to invoke one of these functions. Notes: 1. Update your firewall and anti-malware applications to consider this new version of DXKeeper to be "safe" 2. If this upgrade doesn't work correctly, see the "After an Upgrade" section of 2. After upgrading, to revert to the previous version of DXKeeper, see DXKeeper 15.3.1 is available via the DXLab Launcher and via