Installing knime extension using .zip file

Hello,

I am trying to install the following node: Table to HTML String.

I must install it locally using .zip file, so I have downloaded Community extension Trusted 4.7.0.

I followed the instruction Adding Local Update Site and have added the path to downloaded .zip file → Apply&Close.

However after restarting the node is still not available in Node repository.

Are additional steps required?

Thanks in advance!