cubase 8.5 and Kontakt 5 issues with Rex files

Does anyone know how in God’s name I change the note length of a Rex file coming from kontakt?

I’ve got a rex drum break I’m working with and have dragged the midi from kontakt into cubase. It all works fine, except for note length. I shorten the hits in the midi window but nothing happens

I used to use Izotope Phatmatik pro but they’ve killed it off unfortunately so I’m having to use kontakt now I’ve upgraded to 64bit. Shame becuase that plug was so quick to use… kontakt is great but is so slow for this