I am now running version 3.6.12.
If I save my sequence in the Nutcracker tab then switch to the Preview tab and press the ‘Open’ button, Nutcracker goes into non responding and never comes back. It also includes just trying to click virtually anything after switching.
I can go back and reopen Nutcracker, go directly to the Preview tab and open the file no problem, I can even switch to the Nutcracker tab for editing but if I go back the Preview tab it is not good.