I asked a question and got a reply from Zybnet AVG Technologies asking me to download a tool to help resolve a problem. Is it safe to do this

Yes, It's quite definitely safe. Zbynek is an AVG employee. You should actually have posted in your topic (https://support.avg.com/answers?id=906b0000000D4tgAAC)

Yes, It's quite definitely safe. Zbynek is an AVG employee. You should actually have posted in your topic (https://support.avg.com/answers?id=906b0000000D4tgAAC)