Multimodule does not show up in Build options

[KevC]

I need to update my x-lite Pro so it will work with my vantac mpm multiprotocol module or the r9m module.
When I go into the settings screen I do not see multimodule as a selection.
A friend of mine is on the the same Companion version (2.3.7) and he has that pick.
Ho can I get that pick ?
Thanks

[Kilrah]

Since 2.3.0 multi is always in.