Glad you got it working. Just so you know, I'm having PS CC 2015 lock up occasionally when I invoke Nik Color Efex Pro on an image. Not sure if it's just me, but it seems to do it every 4th or 5th image, and usually when I have more than 4 layers. As a precaution you may want to save your work before calling it as you'll lose anything done since the last save.
Finally did my update to PsCC 2015 today. I just copied my Plug-in file and moved it from 2014 to 2015...closed and restarted my computer and it's all there...ta da...