Need help have photoshop 2015.5 can't open nef files have a Nikon D 500 HELP

I need some HELP! I have cc photoshop 2015.5 in my computer. that version because it works with Nik Collection. I had updated to the new version and discovered my Nik Filters don't work so re-installed 2015.5. Here is the problem I need the adobe bridge version to go with this and can't figure it out! Adobe support keeps sending me in circles and i have been trying for hours to figure it out. I just deleted adobe bridge 2018 as it would not allow me to view my raw files. ugh oh I have a Nikon d500 camera.

Please someone Help me! Thanks so much Susan