Is the Amazon S3 back up feature only in Pro?

I was looking for a way to back up directly to S3 and I just found out that this feature is already built in Virtualmin.

Is this feature only for Virtualmin Pro users? I use the GPL version, I cannot find a menu for S3 settings and I only have FTP and SSH in the back up options.

If it is also available for GPL users, could anyone please tell me how to enable it? Thank you.

This feature is currently only available in Virtualmin Professional.