Bitmap editor from within Rhino

in Windows 7, this works for sure, just did it:

  1. go to HKEY_CLASSES_ROOT\SystemFileAssociations\image\shell\edit\command in registry editor
  2. paste your programme path in Default key, make sure you paste it correctly:

“your programme here” “%1”

mine was:

“C:\Program Files\Adobe\Adobe Photoshop CC 2018\Photoshop.exe” “%1”

keep the " " where they appear.