Yes, there is still the chill kat dll issues. Search the forum for previous posts. Regarding the two PDF converters, they live in harmony with each other. Just don't delete the existing one until you are ready to switch over.
Regarding v2014, you might want to consider installing the v2015 VIP version, especially if you have a fairly vanilla install. I've been running v2015 ADV for over a month, there aren't a lot of reported issues (could be good, could be bad). But there a LOT of new features that might make it worth considering and skipping v2014.