I’m using the Mac app, and have noticed that with recent versions, when I drag the proxy image from the export panel, it’s creating a folder rather than a single image. I think I’ve narrowed this down to being caused by the frame/artboard having a parenthesis in the name – which is common for many of the things I create.
This happens with a single frame selected, and with only a single output format selected.
@leohans You can also drag layers/groups/frames directly from the Layer List to the Finder in the same way, even if you haven’t applied any export settings.
And as a bonus, if you hold down the Option key, you can drag from the Layer List on to your Sketch canvas to insert a single bitmap version of whatever you’re dragging.