This is predefined by the Color-Filter in the Filemanager Q-Dir.
Please click on the menu item Extras > Colors & Design > Disable all color jokes to disable or enable the Color-Filters.
You also can define more Color-Filter settings, click on the menu item Extras > ... more options , and click the Colors tab.
See also: filter the Files in Q-dir || a single tree that can be used for all panes || Q-Dir and new and old Tree-View
Please always use the latest version of ... The Windows Filemanager Q-Dir!
FAQ 2: Updated on: January 23th 2017 20:06