Originally Posted by Bob Olhsson
It's not an upgrade to AAX native, it's an upgrade to AAX DSP. There is no AAX native version yet.
From that Avid post: "version 5 offers new AAX DSP and AAX Native format support".
I don't know if there's a solo AAX native version available for purchase, but there definitely is an AAX native version.
Looks like there's been issues anyway, it's been withdrawn for the time being.
EDIT: although the forum post says withdrawn, it's now available again. And I can't imagine they won't release an AAX only version of it, for a cheaper upgrade price...
MDW is one of the few TDM plugins I own, but if I only owned the Native version, I think I'd struggle to update that at full cost - I'd be more likely to invest in bx_digital or Fabfilter or similar.