Error trying to export ac3D file using Blender

[24lavsri]

Getting below error when exporting ac3d from Blender to Flight gear. The add on is enabled in Blender.

Python: Traceback (most recent call last):
File "C:\Users\lavis\AppData\Roaming\Blender Foundation\Blender\4.1\scripts\addons\ac3d addon_init_.py", line 359, in execute
from . import export_ac3d
ImportError: cannot import name 'export_ac3d' from 'ac3d addon' (C:\Users\lavis\AppData\Roaming\Blender Foundation\Blender\4.1\scripts\addons\ac3d addon_init_.py)

[NikolaiVChr]

Which branch of the export tool did you download and use?

[24lavsri]

https://github.com/NikolaiVChr/Blender-AC3D/tree/4.0
This is what I used.

[NikolaiVChr]

There is now a 4.1 branch

[24lavsri]

ok thank you