There are two little problems relating to the background image setting for the file display (preferences / images / file display).
Is the setting in Preferences actually changing back to something else from what you had set it to? Or is it still as you set it, but not doing what you expect?
If the setting itself is being lost, are other Preferences settings changing OK, and surviving a reboot? (If not, the user profile folder may have incorrect permissions which prevent settings files from being updated.)
If the setting isn't being lost, but things aren't behaving as you expect, then the background image is probably being overridden by some of your folder formats. Go to Preferences / Folders / Folder Formats and go through the list of all formats, checking the Options tab to make sure the Image section is either turned off or in agreement with the main Preferences settings.
solved. Thank you!
