Did you try resuming the download or do it in one go? I ask because I don't think gog allow you to resume with an download program other then their own one. If you can its probably easier to just download it in a single go with your browser. If not you may have to use their downloader which sometimes works and sometimes doesn't.
ı tried to resume it but it cant continue.İ think the best choice re download with gog.com downloader thanks for your help:)