Don't need the go button--at least not for now. Most people just hit enter to start the search.
Regarding the license and copyright: when I registered, I noted that my intent is to buy a license and copyright for the software. I just want to evaluate and make sure that I can make it all work before paying for it. My full intent is to pay for it shortly as soon as I figure out a few bugs. The last software I was using (Gallery2), I abandoned because there were too many issues that could not be resolved. I have the site in a test version in a non public directory for now which is what the registration told me to do while I evaluate the software.