I notice in the features chart free updates for 1 year. But when I looked on Softpedia it showed Last Updated June 2014. Granted Softpedia isn't always aware of the latest revisions. But I would take a look at a change log to see if you are likely to get an update before the year expires.
Have you looked at any of the html output? I get the impression it produces html that is supposed to be maintainable.. which I think is a good thing. But if the source often looks like a paragraph and a half of " " chained together it may not be so.
From my limited experience it seemed like the best resource was forums where those who do it all day for a living give a tip here and there how to do a thing using html/css instead of generating images for everything.
Edit: I am not familiar with the software publisher in this case. But I would try to find out if you are entitled to major version updates. Sometimes they put things on discount because they are about to obsolete that version. Version 11 may come out a week after you buy version 10.