Occasionally, index-specific search folder queries disappear from the "Search Folders" tab in ZyFIND.
Corruption of the '\ZyLAB Data\Indexes\Search Folders\SearchFolders.xml' file due to concurrent write access from multiple users.
Verify that the '\ZyLAB Data\Indexes\Search Folders\SearchFolders.xml file is present and that it can be opened in Internet Explorer with no errors. The full path of the SearchFolders.xml file can be confirmed from the Directories tab in the Options | Global Settings menu in ZyFIND.
6.0 Service Pack 1; 6.0 Service Pack 2; 6.0; 6.1; 6.1 Service Pack 1; 6.1 Service Pack 2; 6.2; 6.2 Service Pack 1; 6.2 Service Pack 2; 6.3; 6.4