Explain exactly what your are trying to do and what problems or error messages you experience.
As I am editing photos in lightroom and just right click on the photo to select to edit in photoshop the opting shows up in gray out but it isn't available for selection anylonger. It was working just fine a few days ago.
Thank you for your reply!!!
This can happen if you are working with smart previews. External editors are not available while using smart previews.