Artifact not found while installing SAPUI5 evaluation edition

Hello Experts

We downloaded the SAPUI5 SDK 1.16 from UI Development Toolkit for HTML5 Developer Center and tried to install it from the local hard disc and received  the following errors

The same occurrs in hana studio 1.00.68 and 1.00.70.

However the manual update from the disc works for SAPUI5 sdk 1.12. As the project requires the SAPUI5 ABAP repository which comes with 1.16. We need to update to the SAPUI5 1.16.

Would you know how to come around this issue?

SAP Development Tools for Eclipse - Juno Software Repository is not accessible within our network to install the SAPUI5 from there.

Any help would be greatly appreciated

Regards

Casper