Faderfox and assigning knobs

Hi all,

A very strange problem keeps occurring. VCV keeps crashing when I am assigning my Faderfox controller. I can assign any hardware knob to any knob in VCV but when I get to the last 8 knobs of the Faderfox, VCV crashes. So, of the 72 knobs available, I can only use 64. Trying to assign knob 65 will result in a crash. So maybe there is a limit of 64??? Any ideas how to deal with this problem? The log.txt seemed normal (no errors).