hi Rich,

after installing the Estonia tool you have a shortcut called Prepar3D v2 legacy mode. In your P3d- root folder there is a file called fsx.exe now. In the syntax starting the sim this file is attached and it looks like that:

"D:\Prepar3D v2\fsx.exe"

D is my volume for the sim. No other tweaks are nessessary to get the plane flying.
And yes of course, the tool is running. I didn't test without it and there is no reason for it, the tool makes no problems.

Kai