Could be, I only tested it with Photoshop 2018 CC, Elements 15 and Affinity Photo 1.6.
Dngallagher wrote:
Yes, the NIK software IS a plugin, it is launched from Lightroom on my machine, there is a settings button on the lower left, BUT as the screen shot shows there is no AFTER PRESSING OK.
Nor have I had the crashes/shutdowns described by the OP.
Since the OP mentions layers, I wonder now if it only happens with Photoshop, and not with Lightroom.