Export a sub domain and use as a main site

I have a muitisite installation with a sub domain "members.calrta2.org" as a sub domain to "calrta2.org". Currently the whole site is in a sub folder of public_html at calrta.info. The folder is "calrta2.org".

Very soon, will have control of calrta.org. I need to make the members.calrta2.org the main site of calrta.org, not a sub domain.

Can I export the site and use it as a (public_html) root site?

Thanks, Ron Scott