The "Edit in External Editors" function no longer works in Lightroom 5. When I click on the "Edit in..." and select either of my two external editers (Photoshop CS5 or Topaz Labs), nothing happens. No error message, no Photoshop, no Topaz, nothing. I can open either one of the programs independently, but the ability to edit using external editors no longer works. Can you please help? As a fashion and portrait photographer, I use this capability frequently on every photograph I process.