ExtPlane
To install the ExtPlane plugin...
On your PC:
Download the attached ExtPlane.zip archive for X-Plane 11 or X-Plane 12.
Extract its contents to the Resources\plugins subfolder of your 64-bit X-Plane installation.
Restart X-Plane.
Download Edition
Note: On Windows, the plugin depends on the Visual C++ Redistributable Packages for Visual Studio 2013 (vcredist_x64.exe) which can be downloaded from Microsoft should you need it, https://www.microsoft.com/en-us/download/details.aspx?id=40784. If you see "X-Plane 11/Resources/plugins/ExtPlane/64/win.xpl : Error Code = 126 : The specified module could not be found." in X-Plane's Log.txt output, then you will need to install it.
The IP address of the X-Plane host computer can be found from the 'Settings -> Network' menu. In the example shown below, the IP address is "192.168.1.100". Otherwise, NETGEAR have an excellent knowledgebase article on how to find your IP address here, https://kb.netgear.com/20878/Finding-your-IP-address-without-using-the-command-prompt.
Once installed, you can assign a joystick button or keyboard shortcut to the "ExtPlane custom command" to control the Push-to-Talk function in XP Remote (Pro version only).
Wayne Piekarski's X-PlaneCDU
For Zibo 737 fans, we would recommend Wayne Piekarski's X-PlaneCDU which also works with our version of the ExtPlane plugin. ExtPlane and XPlaneCDU are both licensed under the GNU Public License V3.