Using symbol other than underscore as end of PointID flag

I've installed and merged Photo Tool v3.1, and need some guidance on how to use the new user-definable end of PointID flag option.

Step-by-step guide

  1. Select an item in the list for PROJECT_OPTIONS.Image_End_PointID_Flag, other than "_", e.g. "#"
  2. Rename the image files, so that "_" just before the first depth is changed to "#"
  3. Run the Add-In to capture all images
  4. Output reports