Does someone know what the registry settings are to allow LabVIEW libraries to be viewed in the Windows Explorer, Utilities that are designed to correct bad registry settings have a tendency to view those entries as invalid and remove them.
All you should have to do is go into LabVIEW and in the Options setup, under Miscellanous, uncheck "Enable Windows Explorer for LLB Files", then click OK. Might have to beboot here. Then go back in, recheck it. (reboot) That should reenable it automatically.