In version 2.2.9 it seems that as soon as an analysis is concluded, the Output, -Variables, -Type and -Factor are inaccessible (greyed out) along with the -Step Increments.
The only way to activate them is to press the Animation Play button. As soon as PPM displays the animation, all the fields are activated.
That could be possible if you downloaded PrePoMax v2.2.9 within 10 minutes from when it was uploaded. I accidentally uploaded the wrong version initially, but I fixed it later. Can you try downloading the same version again?