On the Tracktion page for a Waverazor Free Trial, apparently you need to fill out ALL of the fields on that page.
https://marketplace.tracktion.com/shop/free-trial?sku=waverazor
If you have an existing Tracktion login, just put your login details on the right side, and fill out your personal details on the left, Submit, and it will take you to a page to start a 30-day Trial.
If you don't have an existing Tracktion login, filling out all that data will be used to create an account for you.
I got a response from Brian at Tracktion, and he's looking to improve that UI at some point, but the good news is that is does work, and you can get a Demo.