michaelleung: I still think that renaming is so stupid, and so belt and suspenders. GOG Downloader should either do it for me, or let me download it .exe. Not saying it's hard, just saying it could be better.
michaelleung, GOG.com Downloader should rename the file after the transfer is complete. However, in some rare cases, Windows (or some background service) prevents GOG.com Downloader from renaming the downloaded file to exe. We were able to drastically minimize the chances this bug will occur, but it still happens on rare ocasions :(.
As we couldn't replicate this one in any of our test environments, it would help us a lot if you could send the Downloader log file to our support - more info
in this post. The only catch is that the logs are cleared when you relaunch the Downloader, so the logs need to be send just after you experience the bug.