Hello and thank you for posting on InPixio support forum.
Additional backdrop images used in Photo-montage (available tab in Photo Cutter) are kept in the list of predefined backdrop images until their name or location is changed. Change the file name or the name of the containing folder with one symbol will suffice.
InPixio Support team
Marked as spam
Answered on October 3, 2017 5:10 am
Would it not be easier to add a right click delete option