Accessing MS Project Field Mapping

[Tomico]

We are having problems getting the Addin to load due to our IT system. As a workaround we are going to import XML files into the desktop. How do we map the MS Project fields if we do not have access to the Addin as shown below?

[Intaver Support]

There is a similar dialog box in desktop version that is can be found in the File > Import > Map Microsoft Project fields.