Navigated to the Prepar3D v4 path in Settings and Save. In Addon Mappings, select and Remove any P3D v4 addon entries , press Save, Scan and Save, Do you see P3d addons?
Note you will not see a specific P3D entry itself because we don’t update the P3D data itself as per FAQ - Navigraph updates for FS9, FSX and P3D only
Cheers
Ian