DirBuild
From CometWiki
Comet Explorer Directory Rebuild
The Directory Rebuild program builds new QDIR files for the selected Comet directory. Right-click on the directory's name in Comet Explorer and select "Rebuild directory...".
Before the directory can be rebuilt it must be checked to be sure all the required information is available. Click "Scan for Errors" to begin the check. For any file that requires clarification, a popup dialog will prompt you for the details.