The last available version of SphinxOnline is
4.29
> Release notes
The upgrade to version 4.29 can only be performed if the installed version is at least 4.27.
To update your server to version 4.27, please follow this procedure.
If you have an on-going maintenance contract, you can contact us to get the download link and technical modalities to upgrade to the last version.
Please join your current version number to your request.
>
update@sphinxonline.com