This issue with the interface 'panes' not displaying, sometimes happens when a particular encoded section within the CatTools setting file gets corrupted.
To reset the interface panes back to the default setting, try the following:
- close down the CatTools interface.
- from within the CatTools install directory, open the the KiwiCatTools-Settings.ini file (in a text editior such as Notepad.exe).
- locate the section [Display Options] and delete everything within this section up to the next [ ] section header (or to the end of the file if the [Display Options] is the last section).
- Save and close the file.
- Restart the CatTools interface and the panes should now be displayed in their default state again.