OS: Windows 10 - 64bit
After adding a custom format colour for AVI video files this entry custom format colour can no longer be removed.
Effect: Functionality doesn't work as expected
To reproduce: (steps are copied in parts from XnTriq's description, see http://newsgroup.xnview.com/viewtopic.php?t=33613)
- Go to Tools » Settings... » File list » Format colors.
- Activate Use color based on file format.
- Type avi in the left text box.
- Click the Add button.
- Select avi in the list.
- Choose your preferred colors by clicking the buttons on the right of the dialog.
- Confirm with OK.
- Point the browser to a folder which contains AVI videos.
- Exit XnView (your settings are saved on exit)
- Start XnView
- Go to Tools » Settings... » File list » Format colors, again
- In the list of formats select "AVI" and select "Remove" button.
- Confirm settings with "OK" button
- Exit XnView (your settings are saved on exit)
- Start XnView
- Point the browser to a folder which contains AVI videos.

Expected behaviour: Custom format colour is no longer displayed. In the settings for format colours the custom entry "AVI" is no longer listed.