Check out Playmaker for unity, that might be more the speed you need to start with.

I'd wait on the certificate for a bit, you will be able to get it for free, if you can't already. http://arstechnica.com/security/2015/10/with-goal-of-universal-https-lets-encrypt-reaches-important-milestone/[^]

In my experience, VS2015 has been pretty stable, most of the issues I encountered, even in 2013 could be attributed to extensions. Sander, what extensions do you have loaded?

This product has helped me in the past. R-Studio http://www.data-recovery-software.net/[^] I have used it to even recover files on a Raid 5 volume, I don't know what their cost is now, but if you need the files, chances are they can recover it. Good luck.