Convert MCDX to XMCD

It looks like that there is converter utility available as part of Mathcad  (Primo converter) that can be used to to perform conversion between various Mathcad documents and worksheets, most likely including .mcdx and .xmcd files. It might not work for every document perfectly though and may very well need manual post processing. Unfortunately, this seems to be the only viable option for mcdx to xmcd conversion.