On November 14th, PMDG released an update (build 9930) for 737NGXu.
If you want to download this update, you will need to update PMDG Operations center V2 (this is very important) and after the updated operating center, you can download a new version 737NGXu.
1) Making adaptations to give the product more flexibility and better interaction with users who choose to use shaders.
2) Making adaptations to give the product more flexibility and better handling qualities with respect to ground taxi steering.
3) Some improvements to the overall sound quality in external and “wing view” settings.
If you want to read the full forum post, feel free to do so by clicking here.