I tried going to sketchup 2015 one and half years ago (just before the release of windows 10). Just bought my new pc, but when i installed the vray demo to test if it was worth buying (in the sence: does everything work) I found a weird unexplained bug. My sketchup started to run incredibly slow after installing it (needed to wait seconds for the camera to rotate a few degrees and such). I actually asked the chaos group for help (it was after the install of vray that it happened so i hoped they knew a way to fix it). After they looked at it they were as baffled as me. So that's why I still use the 2013 with vray, as I'm sure it works.
Is there no other way to make the 2013 do as I want? Or do I need to try again with a higher version of sk?