4nizio

There isn't.

It might be failing to close some background threads, keeping some parts of the program "running". I haven't ran into the issue on my native Windows PC(I haven't received reports from other users either.) so it could be specific to Wine.

A window will appear letting you save it where ever you like.

This could be due to Wine not handling the new multithreaded functionality properly.(Not entirely sure but that's my theory.) If it's not too much of a pain, if you've ran Mine-imator at least once, you can launch the world importer as its own standalone app and save .schematic files instead of having to go through Mine-imator.