P: Nik DFine2 hanging in Sierra

>   I will NOT be updating Photoshop again, however. >

There's no reason not to update Photoshop. You can update without uninstalling the last version, so you can keep 2017.1.1 on your hard drive and run it concurrently with whatever is the next big version. Just click Advanced in the Creative Cloud App when you want to install the upgrade, and tell it NOT to uninstall anything. (They really ought to stop hiding things like this from us in that application<sigh>.)

As long as your computer/OS can run 2017.1.1, you'll have access to Nik AND to the latest and best from Adobe.

And if we're very lucky, Google won't kill off Nik entirely, but sell it to someone.

THANK YOU!  NIK is now working again.  I will NOT be updating Photoshop again, however.  It is too bad, because NIK is such a great program, & while I only use 2 of the plug ins on a regular basis, they have become pretty essential to my work flow.

So uploading a picture straight to it,does it effect megabytes of a picture??

Seriously!  It's a shame Google bought this amazing software and left it to die!  

Thanks for the update Jeffery.  I think there are a LOT of us who still use Nik as our main filter software and it's also in turn a big part of our Photoshop/Lightroom experience.  We appreciate your efforts in keeping it going!   

everything is working again...  thanks a lot

And for future awareness, since the Creative Cloud app hides so much and you will probably want to be able to go back a version now and again, when you see "PREVIOUS VERSIONS>" down in the list, clicking on the arrow will show, right beneath it "FIND ADDITIONAL APPS."   To the far right of that will be something with a down pointing arrow. Click on the arrow to get, at the bottom of the list,"View Previous Versions." You can filter the list according to type of app if you like.

No need to rollback. Just install the 2017.1.1 update to correct the problem: https://helpx.adobe.com/photoshop/kb/uptodate.html

I have tried the method as described above but when I click on view previous versions, it doesn't show the drop down of previous versions.  Any help?

Thanks a lot, Jeffrey. Everything is working fine again.