When attempting to start SolidWorks 2020, you may encounter a dialog box stating: "Invalid (inconsistent) license key (-8 544 0-)."
: Background processes from previous failed launches, such as sldworksfs.exe solidworks_fs.x Troubleshooting Guide: SolidWorks 2020 Error -8 544 0-
This removes the corrupted local data forcing the –8, 544 error. Check FLEXnet debug logs: