Hi william, yeah it's unfortunately a "false positive" problem that seems to be specific to ESET.

The 30-day trial uses a system called Themida to make it more difficult for hackers to remove the 30-day time limit on it. ESET seems to automatically categorize any program that is wrapped by Themida to be a virus, I'm not entirely sure why they do that you would need to ask them.

If you unblock it, it should work fine and if you're worried that it's a virus you can run it against 30 or 40 different virus checkers as virustotal.com to verify that it doesn't really have a virus in it.

- Michael