QTR-Quadtone RIP

I was using the older QTR and had finally more or less come to terms 
with it, no blending on curves, no tweaking anywhere, using Epson 
papers or Moab or a few others. (Epson 2200, epson inks). My prints 
were fine, warm but pretty darn good.

I downloaded the new QTR, used the QTR cleaner software to remove all 
instances of the old one, loaded the new one and printed, also no 
tweaking, same file, same paper and the print came out muddy.

Any thoughts? Does one have to pre-tweak the new one? I'd really like 
to use it as it looks a bit better.

Thanks

Jules