If it's just a matter of having the datastore vm foldername match the display name of the VM object in vCenter, you can do a simple storage vMotion to make that happen while the VM is online.  Assuming this advanced setting is still required if not default anymore:  VMware Knowledge Base

LucD​'s solution will simply reregister VM to vCenter to the existing path, but will not match display name to datastore path of VM.