Comodo Offline Updater

I have downloaded the zip file and started the .exe file. I have a bases file that is updated till August 2015. Can I put into the downloads folder?
How to use the comodo offline updater? There are three buttons start stop and update, which one to use. On clicking start,it is saying start update over …minutes.

Did COU download the bases.cav of August 2015? That’s an outdated bases.cav.