Windows 10 – Import-StartLayout Doesn’t Change Anything

I'm trying to create a layout template on Windows 10 using the Export/Import-StartLayout commands.

Here's what I've done.

1. Open an admin PowerShell window.
2. Run Export-StartLayout -Path layout.xml.
3. Unpin some tiles from my start menu
4. Run Import-StartLayout -LayoutPath layout.xml -MountPath C:\

When I look at my start menu now, the tiles I remove haven't come back. The Import command gives me no errors.

Am I using the commands wrong? Is there something else I need to do before/afterwards?

Here's the contents of layout.xml

<LayoutModificationTemplate Version="1" xmlns="http://schemas.microsoft.com/Start/2014/LayoutModification">
  <DefaultLayoutOverride>
    <StartLayoutCollection>
      <defaultlayout:StartLayout GroupCellWidth="6" xmlns:defaultlayout="http://schemas.microsoft.com/Start/2014/FullDefaultLayout">
        <start:Group Name="" xmlns:start="http://schemas.microsoft.com/Start/2014/StartLayout">
          <start:DesktopApplicationTile Size="2x2" Column="4" Row="0" DesktopApplicationID="C:\Users\Jozsef\AppData\Roaming\Spotify\Spotify.exe" />
          <start:DesktopApplicationTile Size="2x2" Column="0" Row="2" DesktopApplicationID="{6D809377-6AF0-444B-8957-A3773F02200E}\NetBeans 8.0.2\bin\netbeans64.exe" />
          <start:DesktopApplicationTile Size="2x2" Column="2" Row="0" DesktopApplicationID="{6D809377-6AF0-444B-8957-A3773F02200E}\HeidiSQL\heidisql.exe" />
          <start:DesktopApplicationTile Size="2x2" Column="0" Row="0" DesktopApplicationID="{7C5A40EF-A0FB-4BFC-874A-C0F2E0B9FA8E}\Notepad++\notepad++.exe" />
          <start:Tile Size="2x2" Column="2" Row="2" AppUserModelID="Microsoft.WindowsCalculator_8wekyb3d8bbwe!App" />
        </start:Group>
        <start:Group Name="" xmlns:start="http://schemas.microsoft.com/Start/2014/StartLayout">
          <start:Tile Size="2x2" Column="0" Row="0" AppUserModelID="microsoft.windowscommunicationsapps_8wekyb3d8bbwe!microsoft.windowslive.mail" />
        </start:Group>
      </defaultlayout:StartLayout>
    </StartLayoutCollection>
  </DefaultLayoutOverride>
</LayoutModificationTemplate>