can you give a screen capture for the issue?

did you install Microsoft visual studio C++ redistributable 2015 or 2017 package?

due to it in VC, you must contact to aircraft developer. the lit gauge are need correct material/texture setup in the model

we just provide basic item for other developer, so with that they could customize to fit with certain aircraft and get as real as it can get.

make sure custom gauge not over other gauge.

please make correct setting in configurator.
NAV1 and NAV2 need to set to which radio would be use.

yes, it support for P3D v4.3

I got contacted and they told us will make fix in C310 Redux for KingNav.

press FUNC button till at "Edit Flight ID press ENT". do not press enter, but pres VFR. preset VFR will show after that enter 4 digit new VFR code. after 4th digit window will back in standard page. press enter to swap new VFR set with existing code.