This has now been fixed with latest ASFS beta 8995. Just select “upload a new weather snapshot” and simbrief downloader will now finish as it used to do, 'cause ASFS is now much faster downloading the weather.
Hi, thanks for the info!
I also have an update to the SimBrief Downloader coming to handle this, so I guess it will be double-solved. 
Best regards,
U R welcome, thanks very much for updating simbrief.