There is no difference in the installer for Xeams Community and Enterprise Edition. It will run as if you have purchased the Enterprise Edition for the first 30 days. It will then get converted to Community Edition unless a license is purchased.
From the ClamAVClient.log,i see that even jpg png gif was sent to Clamav for checking virus,i think it is no need.
It is better there is function to set exclude extention virus scan.