Avast Free Antivirus Software Won't install with other products in place

I have Avast Clean Up Premium and want to install the Avast Free Antivirus program. Installer says I must remove the Avast Clean Up Premium to install. Is Avast Clean Up running an anti virus/antimalware scan? Is there a compatible product that won’t have me un-install programs I have paid for?

No idea why its doing that but as long as you have the licence key for clean up then delete the program. then install avast free and then enter the code to activate the clean up program into the avast UI