Thanks for reaching out.
We just ran some tests here in our office - and it does look like the "never notify" option in PingPlotter Free doesn't work as expected. Sorry for any inconvenience this may have caused.
If you're interested - PingPlotter v5 *does* offer quite a few improvements, and a few new features (more details here: http://www.pingplotter.com/products/free.html
). This new version can be run side-by-side with v4 as well (and the two won't interfere with each other) if you'd like to try it out!
Please let us know if you have any questions.