Hello.
you should be able to fix it just configuring the gauge property in SImDash.
In the Pro-Gauge configuration screen, in the page where you configure the gauge, there are 5 sliders corresponding to the 0%, 25%, 50%, 75% and 100% positions of the gauge.
Just move each slider so that the needle move to the corresponding position. For example move the 50% slider until the needle is half way through the scale.
to the same with the other sliders.
this is all you have to do and the needle should move in the correct direction.
Regards
Cristiano