Custom Presets missing can anyone help?

I’ve made literally hundreds of custom presets in my Nik Collection over the last 8 years. They are vital to my brand and hard to recreate. When upgrading to Nik Collection by DXO 2 it seems I’ve lost them. I updated my Mac OS and PS 20 recently and had to update for compatibility. I was also careful to check the box when installing to save and import my presets. Can anyone help me locate these presets and get them installed? Support has been unresponsive to this point. Thanks everyone…tough times. Greg

Check here: lost my customized presets can anyone help?