Having been a keen supporter of this plugin since launch, i was disappointed to find that Google had decided not to give future support.
Therefore when i installed new OS onto my Mac the access was lost.
The good news after trawling the web (perhaps many of you already know this) that DXO have now purchased the rights and will give full support as from next year.
In the meantime you can download the most recent version from via link
https://nikcollection.dxo.comAnd its still free of charge but how long ?
I have now reinstalled onto my PS and seems to be fine although a slower but its always has worked in LR
Best of luck