I uninstalled DOCman v1.3RC2 and all my documents are gone?

If you have uninstalled DOCman 1.3RC2 without installing the patch first (or if the patch was installed incorrectly), all your DOCman database tables will be deleted. The only way to get them back is by restoring a backup

You'll need all tables starting with 'docman_', as well as the categories table.