Those libraries or database drivers, known as external modules, may be required by some of Talend components or by some connection wizards or by both. Due to license restrictions, Talend may not be able to ship some of these external modules within Talend Studio. You need to install them for your Studio to functional properly since 6.0.
Please refer to this installation guide for more information:TalendHelpCenter:Installing external modules
Best regards
Sabrina