Technically speaking, the product page does indicate that it converts between plugins. However, the "view required products" field only indicates that you need the base app, so I can see how a customer would miss the fine print. Ideally, there would be someting on the page that would make the requirement of having other plugins as obvious as the mention of the base module. Something like "at least one other UTC plugin plugin" in the "required products" field with a link to a page displaying all of them. I can see how you feel misled. I can also see DAZ' defense. :-) If I were you I'd call their customer service number, politely express why you didn't appreciate the surprise. Maybe they'll do something compensatory, maybe not, but it would be good of them to consider making the true requirements clearer. By the way, the price variation on those plugins is weird. Cool app, though.