I'm afraid that just because you have the HANA Studio, it doesn't mean you have the HANA client installed. The HANA Client is a separate uninstallable package from the HANA Studio. The Studio hasn't been dependent upon the HANA client since SPS 07.
If you have a fully licensed version of SAP HANA, you can can download the HANA client from the Service Marketplace. Otherwise the HANA Client is not distributed as part of the free trials. Only the HANA Studio is.