I want to fly the gyrocopter ELA 07S model but it has not been upgraded for X-Plane 11. The developer has stated that he is no longer supporting the model.
A forum user has successfully upgraded the model and gave me the following advice.
"I had the same error in X-Plane 11 and read on the forum about possibly updating older flight models, by loading them into a slightly later versions of X-Planes Planemaker. I believe it must be a close version of Planemaker to read the .acf file. So I loaded the ELA 07S into X-Plane 10.52.2 Planemaker and that read the .acf file and updated it. Then I loaded the X-Plane 11.0 version used that to read the.acf file and it worked! It also runs in X-Plane 11.30."
So my question is how can I upgrade the old format .acf file for the gyrocopter so it is compatible with V11?