Cool! Reason for the UNC request was that my test UNC job failed.. but I was trying to use the admin/hidden shares for src/dest. Might also have been due to user auth failure when accessing the shares. Maybe add an alternate user creds option to the job if using UNC?
Not sure about storing or accessing actual user credentials through a KarenWare application, but this might relate to T141: Replicating network drive doesn't cause Windows to connect to source or Replicator doesn't retry when it should. Perhaps there's a way to stimulate Windows itself into bringing up credentials it has stored to access a network share.