Hi!
We released a new V4.4 version of our RFN_CarrierGauge which is now compiled also in 64bits!
You'll find on our RFN website a package dedicated to 64bit platform which allows you to use the RFN gauge on P3DV4.1 (and later).

As I had to do some modifications in my code, there are some changes in the way to install the dll and configure panel.cfg: please read the package's docs !

Regards,
Sylvain