Hi!
I've made converter for Quixel Suite 2 materials (but NOT Smart Materials!) and masking patterns to format, compatible with all Substance-supported applications.
Upload does not contain any content, owned by Quixel or Allegorithmic. You will need Quixel Suite 2 and Substance Designer licenses to use this.
Tested on Quixel Suite 2.3.1 and 2.3.2.
Link to gumroad: http://gum.co/q2s