How to Install Plugins into Affinity Photo
With Affinity Photo, you have to go into the prefs and turn on the “Allow Unknown Plugins to be used” option to install plugins into Affinity.
Note: If you have the Apple app store version, then you need to set the Plug-in search folder as noted, and press the Authorize Global button (Mac only)
Once installed, you'll find the plugins located under Filters>Plugins>ON1
* Note Resize and HDR plugins are not compatible with AFFINITY PHOTO and will not install as plugins.