This month, after the last updates, most of which were related to NetBalancer's core performance, we took some time to improve the UI (aka user interface) and found that it would also benefit for some performance improvements. So version 6.4 has a more fluid UI, plus a small but useful addition: now the filters window shows how many packets and data passes through every filter, it helps to find if a filter is active at the moment or not.

Update: 28 Feb 2013 - Yesterday's version 6.4.2 fixed some errors in 6.4.1, while today's 6.4.3 fixes errors in... right, 6.4.2.

Download the most fluid version of NetBalancer here.