I downloaded Word List Expert trial version, then when I wanted to buy a licence, a pop window informed me that this product is no more on sale, and redirected me to another website that sells website domains. Nothing to do with Word List Expert.
It's impossible to acquire a license for this software anymore. I've visited the official website and it appears that a 404 page error is displayed instead. The HTTP 404 error means that resources are not there or they've been moved to another location.
I recommend checking other applications from the same category using the following link: http://software.informer.com/search/seo+words