Can Webroot be returned to default "no threats" status?

Webroot on Mac got very confused, and I got confused, in the process of a very long scan process that involved a complete scan of a computer with several attached drives which included Time Machine.  I collected  11 or so "threats" because of "KeyLogger.SpectorPro.r" detected in the Apple Kext Exclude List, in Time Machine back-ups.  A good response on this forum concerning this detection is here:
https://community.webroot.com/t5/Webroot-SecureAnywhere-Antivirus/keylogger-spectorpro-r-is-detected-as-a-threat-However-unable-to/td-p/225490
 
Anyway - after 15 or so hours of scanning through my Time Machine, several new scans had begun that I did not notice (I failed to stop scheduled scans, and plus others errors on my part, and several new scans began...) -- Webroot became frozen, and so I shut it down.
 
Now, Webroot has "threats detected" which I would like to assume are all merely KeyLogger exceptions (all eleven have been), and I do not want to run scans for another 15+ hours to merely get back to where I was before it froze. 
 
Question: Is it possible to erase Webroot's history and start afresh, with "no errors", and this time not scan Time Machine?
 
2nd question:  Is it possible to select and specify which disk drive or disk partition is to be scanned, by WebRoot?
 
Help would be greatly appreciated.