Remove old versions of PhotometricMosaic

You only needs to do this if:

1. you manually installed PhotometricMosaic 4.0
2. or you are unable to upgrade to PI 1.8.9-2 build 1588 (or later)

SCRIPT > Feature Scripts...

Deselect:

• Mosaic > PhotometricMosaic
• Mosaic > SplitMosaicTile
• Mosaic > TrimMosaicTile

Press Done.
Restart PixInsight