I don't understand. I exported the VM to the C:\export folder and at the time of import it fetches the VM HDD from the C:\VMs folder? What do you mean?!! The C:\VMs folder is set to the default folder where I position the new VMs created....
Set-VMHost -VirtualMachinePath 'C:\VMs'
Set-VMHost -VirtualHardDiskPath 'C:\VMs'