NIC binding – traffic direction

I have this issue after installing Smart Security, previous setup with different firewall worked 100%. I have two NICs in my PC both with different ISPs & IP addresses. All my internet traffic goes through primary NIC except for one application which is bound specifically to the secondary NIC. After ESS install that application is “forced” to use primary NIC despite being “told” to bind to secondary NIC and use that as internet route. If I disable ESS everything works fine and as stated all that worked fine with my previous firewall without any need for me to configure anything in it (except in the app to bind to specific NIC and or IP address). So I’m looking for help how to do that in ESS as so far I’m utterly unsuccessful. I have email that problem few days ago to ESET but no response.