Finally found the issue. Even though Steam MSFS was uninstalled, and Steam itself was uninstalled and all Steam folders were deleted there were left over files in the windows drive programs folder that the uninstallations did not delete. I finally tracked it down by reading a log file from the FSUIPC installer. The installer’s msfs community file check pointed to an old, undeleted Steam MSFS .cfg file. With this info. I was able to track down and delete the offending left over folder and solve the issue.