As of version 0.9.22 our downloader should continue the download after a broken connection or a time out. The fact that it stops completely means that there are difficulties with reestablishing the connection.
It would help us a great deal if you could send as a log file with this unusual behavior, you can do that by:
1. Starting the downloader app, and starting to download the file
2. Wait for the transfer to stop in a way that would require you to manually resume
3. Close the app
4. Go to C:\Documents and Settings\USERNAME\Application Data\com.gog.downloader.SIGNATURE\Local Store
where:
USERNAME - is your system user name
SIGNATURE - is a long string of random letters & numbers
5. Send the "gogDownloader.txt" file to support@gog.com with the link to this post and short description of the problem.
It is important that you proceed exactly as written above, because the downloader clears the logs every time it starts, so you have to catch the bug in the logs and send it to us before you relaunch the downloader app.
It will help us to determine what is wrong and to fix this in the next release of our app.