I've added quick support for changes in 5.1 (presumably). Build is available in the same place, now 5.0 and 5.1 versions has separate override options. Though some really big static meshes (over 200MB) doesn't seem to work here, I'll look into that a bit later. General limitations are still applied - you need to disable materials for meshes to load properly in most cases.
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@Haise Sasaki: I just understood that export of selected assets and selected folders is done differently, while I'm only testing export from flat view (selected assets), which worked normally. Just made quick fix15, export of selected folders should work now, if all assets from it can be exported in general.
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