I do not understand.

You can both upload and download on background.

And for downloads in background? That's my wish, downloads in background and I can change in directories :)

Thanks in advance :)

That's what the Transfer on background option is for:
https://winscp.net/eng/docs/ui_copy

Option to move already running transfer to background will be added soon.

I often upload files in different directories and now i have to wait until every tansfer finished to start the next one.

It would be easier when i could switch the uploading-dialog to background and start the next transfer. The uploads don't have to upload simultaneously. They can upload successively.