I'm getting an idea why there is no trial version available, but you only find out after buying it that the approach is good, but the implementation is bad.
The primary goal of Markdown is to achieve rendered output with as little effort as possible. But what are you supposed to do with rendered output that looks like this and provides no, absolutely no possibility to customize it (fonts, sizes, spacings, colors, ...) with a reasonable amount of effort?
Where are the different stylesheets you can expect if more than a handful of users have individual requirements?
And why on earth is the output squeezed into this narrow frame which, with all the resulting line breaks, makes reading source code it an absolute horror? Who comes up with something like this and then squeezes it into code without any possibility of changing it?
I can't express how disappointed I am with this purchase, because as it is, the HTML output is a pain in the eyes and is useless!