I too am having this same problem.
OS windows Server 2008 R2 Stnd
SQLBackupAndFTP 10.0.18 Lifetime
Error within application when trying to Save job. "Job Scheduling error: Can't start SqlBackupAndFtp Service: Cannot start service SqlBackupAndFtp Service on computer '.'.: The service cannot be started, either because it is disabled or because it has no enabled devices associated with it"
Error when restarting service. "Windows could not start the SqlBAckupAndFtp Service service on Local Computer Error 193: 0xc1"
Error in Event Viewer: "The SqlBackupAndFtp Service service failed to start due to the following error:
SqlBackupAndFtp Service is not a valid Win32 application."
Application was working up to 11/30/2017 with no problems. Tried uninstall/reinstall twice, same result.