Change the .fbx file association to blender_to_os.bat. To do this, right-click any .fbx file, click Properties, and change the Opens with preference. Click on more apps↓, scroll down and select Look ...
This is truly my last option hoping that Unity won't destroy my finger rotations (it ONLY destroys my finger rotations) i download 3.0 specifically for this just to be safe i export, selected objects ...
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