please help re-listing sigasi

The solution https://marketplace.eclipse.org/content/sigasi-studio appears to have been unlisted by recent updates.

While agreeing with the move to https links, we never received any of the associated warnings, probably because the email address listed as owner no longer exists.

In my marketplace account, the entry is not visible. Can you help with getting access to sigasi-studio so that I can update the requirements to be re-listed?