Denford Software & Machines

I'm trying to download some new upgrades of software and I get message "Zip file has been blocked by your firewall ".

I downloaded some upgrades last week without any problems, any changes made in the last few days?

Which zip file failed ?

I have just tried the VRMilling v5.19 zip file and it downloaded OK.

I'm guessing that something has changed at your side - possibly with your Internet providers ?
Maybe they have changed download limits, or added spam / virus protection to your service - I'd ask them.