When inputting/outputting programs, FG and BG folders should match. However, background edit is typically used to access and edit and separate program within the CNC while a part program is currently running. This way you can multitask by changing a program without interrupting production. Whenever you are done with BG edit functions, always select BG ALL END to exit from the BG edit function. Please feel free to reach out to engineering@tsugamiamerica.com for any other questions.