I move our site from
www.oursite.com/testing
to
www.oursite.com
Now what files needed to modifed in Virtumart so all setting work fine.
We are using latest version
IMHO, with a stock setup, none
When changing directory I just drag and drop using FileZilla. Using that method you may need to change Joomla's Path to Log Folder as it will continue to point to the subdirectory, and possibly the VM "safe" path.
But that is all.