G5 Auteur not updating via Envato Market plugin

I have the Envato Market plugin installed and connected with the token. It should give me updates - but has not for a long time for the G5 Auteur theme. The other themes have the updates. The people who produced this theme say they cannot assist as it is an Envato Market issue. Advice appreciated.

Hi @Darcy1968,

You can download the update version from Envato Market Downloads page and update manually using ftp or control panel.

Note: Better to keep a full backup before doing the update.