3D-e-Chem extension cannot be installed in KNIME 4.7 or 5.1

Dear everybody,

I recently switched from KNIME AP 4.6 to 4.7 and I realised that the 3D-e-chem extension is no longer available for this KNIME version. The same is true for KNIME 5.1. As this extension is extremely valuable for cheminformatics tasks I’ve tried to install it from the KNIME 4.6 repository (i.e. https://update.knime.com/community-contributions/4.6).

After enabling this repo I can correctly see the 3D-e-Chem extension in the extensions list but if I try to install it, I receive the following error:

“Cannot perform operation”. “Will not be installed”.

Please, does anybody know how to install this extension in KNIME 4.7 and 5.1?

Gio