I would recommend that you stop the SmarterMail service, and then delete the following two files:
C:\Program Files (x86)\SmarterTools\SmarterMail\Service\Clam\etc\clamd.CONF
C:\Program Files (x86)\SmarterTools\SmarterMail\Service\Clam\etc\freshclam.CONF
Upon service restart, if you're still seeing multiple processes, then I would suggest opening up a support ticket.
Technical Support Specialist