Change sub-folder to root directory

We have a web site at [login to view URL] based on Open Reality. We have created a sub-folder [login to view URL] We need to make the /wp4 accessed from 1stchoicespain.com. Necessary to move existing O.R. site and data to a new sub-folder. The /wp4 sub-folder becomes the new root accessed from .com. The Host - SiteGround - tried to do this today and failed as ALL customization to theme and premium features in the /wp4 sub-folder disappeared. We need the root to reflect all of the attributes available in [login to view URL] when accessed from 1stchoicespain.com.