On the subject of conversion rates, the Download and Buy links are separate, with no mention of an unregistered trial or watermarked demo mode. That uncertainty might be affecting your tryout rate. If the "Download" button said "Try it!", then the certainty that there is some usable trial would be higher. Side note: I notice that the (watermarked) saved images lack EXIF info - is that preserved in the registered version? This is very important for many photographers...
I've done some A/B testing with various download button labels, but I should probably go back and do it again now that I've switched from a 30-day trial model to a watermarked-demo model. As for preserving EXIF data, I think that should be an easy change, so I'm going to add that one to the feature list.
