I find it VERY HARD to find information on your site. For example, I have spent the last 15 minutes looking for the page that has all the versions and what was fixed in each. I can't find that, but ...
Here is an example: I click a link to look at version changes, and I get here:
https://smartbear.com/product/collaborator/overview/#_ga=1.230767387.549687392.1461853517
Nothing about version changes.