I don't know how to switch vray currently installed for SU 2014 to my newer 2015 version. I tried to update using 2015 directory but is still working on the 2014 version. I need to switch them

How to install Vray 3.0 pack to Sketchup 2015 instead of the version 2014? I installed the new version but even after I selected the 2015 directory is still installed for 2014 not showing in 2015. I don't want to remove yet 2014 but wanted to test vray in 2015. Hope I can get some help,

In my case the crashes almost stopped after unchecking the "Use Fast Feedback" in the Open GL Preferences. This helped in the ast with all the other Pro versions.
I'm running Windows 7 Home Edition on a Dell laptop.
It's worth trying since it did not seem to affect the program or computer performance.