Because you have to download the module.
http://tuto.dxo.free.fr/EN/Efficacite/Efficiency.html#A1_Les_Modules_Optiques
- Close and reopen PhotoLab
- Upload the module upon request
https://help-photolab3.dxo.com/en/dxo-optics-modules - Preset “1 - DxO Standard”
Pascal