Thanks. It might have worked. But chances are that you would have been under attack too …
For your layer problem, there is a way to achieve by hand what you want.
Turn off UV Sync Selection. Now select the geometry in the 3d view where you want to export the uv geometry for. You will notice that the UV editor now only shows the uv geometry for the selected part. And when you export it then just this part will be exported.
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