How to keep logs/history when reinstalling NIS 2012

When I first installed NIS 2012 last week, I had not done a thorough uninstall of Avast and I still had Adaware on my machine.  I have read on the forums that NIS 2012 may not install correctly in this case so I want to reinstall NIS 2012 now that I have completely removed these 2 programs.

 

However, I want to keep the logs and the history of what NIS has cleaned since I installed it.  Where are these logs located?   I see in history that I can view the logs and export them, but they are in a strange mcf format. 

 

Also, If I use the NRnR.exe to do the reinstall, will it leave my history intact or will it wipe everything?

 

Thanks