On KPF4 page it says: "Kerio Personal Firewall 4.0.6 is for testing purposes only. Please send your comments and bug reports to kpf_bugs@kerio.com.
This address is NOT a technical support contact, we don't provide any technical support of beta versions."
However, I use KPF4 with The Bat! 2.01.3 and your Avast! for The Bat! beta plugin by...Vlk!!!!