Avast Folders

I tried Avast Pro and it didn’t run well on my system so I reverted back to the free edition. I had issues getting everything uninstalled and went back and forth with uninstalling and installing the right program. Now I see two Avast folders, Avast [162 mb] and Avast[2] [60.5 mb] in my program files. They were created at different times so I’m assuming the older one was again something left behind. Am I correct? Can I delete this folder? Thanx

Uninstall Utility http://www.avast.com/en-no/uninstall-utility