Hello Diego,
You cannot export that information directly from the GUI. You can though extract that information directly from the MySQL database. RDP to the NFA Console and issue the command below from the Windows prompt. This will create a text file with the list of all enabled interfaces along with the IP address of the routers they belong to:
mysql reporter -t -e "select inet_ntoa(r.routeraddress),i.ifindex,i.ifname from routers r join interfaces i on r.id=i.routerid join agent_definitions a on i.id=a.interfaceid where i.enabled='Y';" > interfaces.txt