Alright,I have activated Avast Internet Security on a VM, by following the instructions provided on it, Avast Internet Security 19.1.xxx
So I followed the same instructions for Avast Premier 19.4.xxx and it worked.
Turn off your Internet and run the "Host.cmd" as an admin, for running the setup.
Disable Avast anti-virus Self-defense permanently. It is very important.
Temporary disabled Avast shields from the tray Icon
Copy the License file to "C:\ProgramData\AVAST Software\Subscriptions\" and mark the license file as ReadOnly.
Open Avast and add the License file from the path above.
Enable the Avast Shields now. But Keep the Self Defense Disabled Permanently.
The VM I had activate earlier reverted back to the free version.
I tried that key posted above, on the Premier version, once the system rebooted got another notification to reboot, did that and my system is back to the Free version.
So far I was using the Internet or the Premier for the firewall, I will look a\for an alternative app.