All the sparse bundle disk images belonging to folders protected on your boot disk, as well as the fake ones are stored in /Users/myname/Library/Application Support/com.taoeffect.Espionage3/Data
To determine which images are fake and which contain actual data, you have to unlock espionage, and click onto small "i" near the folder name in the Espionage folder list. THis will take you to the folder options, one of the drop down menus will show you the disk image name. Note it for each protected folders, and you can delete the rest.
For the folders on some external volume, we will ask you where do you want to store the disk image before encryption, but for each folder there will be just one disk image, so there will be no fake ones. All the fake ones are in the folder mentioned above.
Let me know if you have any further questions,
Rgds
Zsolt