Place PNG icon files here:
  icon-16.png   (16x16)
  icon-32.png   (32x32)
  icon-48.png   (48x48)
  icon-128.png  (128x128)

These can be generated from the scExplorer logo using:
  convert logo.svg -resize 16x16   icon-16.png
  convert logo.svg -resize 32x32   icon-32.png
  convert logo.svg -resize 48x48   icon-48.png
  convert logo.svg -resize 128x128 icon-128.png

Or use any online icon generator with a microscope / molecule image.
