Hi JohnTwilley,
2020-01-10 12:06:20.163 [INFO ] Processed configuration for default applications
Default application settings are "processed" during logon, but they are not applied yet (because Windows might/would overwrite them later.) We need to wait until File Explorer has loaded before making our changes.
So, near the end of DEM's logon run, we schedule a separate run of FlexEngine.exe to apply the collected settings, by registering it to run via File Explorer's RunOnce functionality. Is there anything near the end of the normal FlexEngine log file that might point at an issue with this?