"Drools Workbench" for 6.0 moves to using "Kie Projects" (that are the project structure for Drools). A "Kie Project" is a standard Maven project.To add JARs you need to import them into Drools Workbench's Maven Repository. This can be done from the "Administration" perspective. Once the JAR has been uploaded you can add it as a dependency to the project using the Project Editor.

[*] You may have noticed I used the phrase "Drools Workbench". This will be for 6.0 what "Guvnor" was to 5.5 and prior, although there remain some ongoing discussions.

With kind regards,

Mike