Yeah, you can probably block that IP
in your firewall, router. How to do that depends
on your firewall. Using iptables you'd do:
iptables -A INPUT -d 216.35.74.0/24 -j REJECT
Also you may be able to replace the adware DLL
with a bogus stub that doesn't do the ads.
See the adware page on
http://cexx.org/ .
But hmm, aren't the ads the way that you pay for
the software? Isn't blocking them in fact stealing?
Can you instead fork over the $10 for the registered
version of either that software or another program
that accomplishes the same task? Come to think
of it, if 20 webmasters each spent 2 minutes reading
your post, did we just waste 40 minutes because
you want to steal software rather than finding similar
free software or paying a few bucks for it?
I don't know the answers to these questions,
of course, but they are interesting questions.