Hi Rafael390,
Very wise decision on your behalf. Just wait for an avast team member to give a final explanation as to what they flagged there.
"Wysiwyg"-website CMS can be a minefield in the hands of the unaware, but again also the avast detection can be an FP, temporarily correct or just for another domain that shares that IP. Wait for an avast member to appear as this will most likely be after the weekend, I presume,
Stay safe and secure both online and offline, is the wish of,
polonus