Have you reset your Lightroom preferences file?
You didn't say which Lightroom version so I can't give you specific instructions.
I hace not reset the preferences, but they point to photoshop CC2015, and I have Litghrom CC 2015, latest version
Sent from my iPad
I checked my Lightroom preferences file, and my file: ”Users>my name>AppData>Roaming>Adobe>Lightroom>External Editor Presets” is empty.
Do you Know what should I do?
Enviado el: sábado, 19 de marzo de 2016 14:24
Para: Luis del Nido Ojeda <Email removed>
Asunto: Lightroom "edit in" command is dimmed
Lightroom "edit in" command is dimmed
Hold down [Alt]+[Shift] and launch Lightroom.
Overwrite the preferences when prompted to do so.
Afterwards, close Lightroom and reopen.
Does it work now?