Install Nik Software
Click the link to download the software.
(You can also go to https://nikcollection.dxo.com/ and provide your email and they can send you a link to download)
Open the downloaded file and select Run.
Install Nik Software to PaintShop Pro
Launch PaintShop Pro and go to File > Preferences > File Locations
Ensure that the Enable plugins checkbox is ticked to allow PaintShop Pro to recognize 3rd party plugins.
On the left side under File Types, select Plugins and browse to the installed Nik Software folder found here:
C:\Program Files\Google\Nik Collection by clicking Add.
When you see the file path selected in your File Locations dialog box, Click OK to complete the installation.
Be sure you verify that the correct plugin files were included by taking a look at the file formats. For example they should end in: *.8bf, *.8be, *.8bi or *.8ba.
Click on image to see full view.
Click on image to see full view.
You might need to restart Paintshop Pro to see it on the Plug In List.