I have had some issues recently with the information included in the RADIO PANEL INSTALLATION FILES.

Here are some answers:
The included instructions.txt file says to use pins 6,7,8 for Din, Clock and Load.
However, the sample .ino file is setup for 16,17 and 18 for Din, Clock and Load.

Please check and test with those pins.

Encoder issue of not changing digits with each "click"
As of ArdsimX version 1.31, another line needs to be added to the data.cfg file in the ArdsimX plugin.
Please go to this link:
Click the encoder picture.
Read how to set the acceleration and encoder type.
PropWashSim encoders are all type 2

Email if you need further assistance.