Relaunch Photoshop. Find the panel under Plugins > Lumenzia . For Older Versions (CS6 to CC 2021)
Version 11.7 introduced fully interactive previews that allow you to isolate subjects (like a sky or a flower) directly on the orange preview layer before applying the mask. Download File Gregbenz Photography - Lumenzia v...
Double-click the .ccx file found in the "Assets" folder. Relaunch Photoshop