This morning Photoshop 2014 and 2015 were playing nicely together. I came back after dinner and now all choices in the "Photo->Edit In" menu section are grayed out and cannot be selected. I have performed a hard reboot without any change in this problem.
Does anyone have any ideas?
I hate to ask, but just in case....
You do have an image selected. Right?
If there is nothing selected in the grid the menu choice will be grayed out.
Does it work with Ctrl+E (Cmd+E)?
If not go to preferences and under the external editing tab check that Photoshop is recognized.