As far as I can tell from our system, you should have gotten a reply to your suggestion, plus the messages regarding account name and login problems and your problem with the Downloader. I will post this message on our forums and send it through a non-GOG.com mailbox, perhaps @gog.com mail addresses are blacklisted by your mail server or mail program for some reason. Did you get order confirmation e-mails from us?
The last reply (the one relevant to the Downloader) was incorrect, I must have mis-clicked and replied to your message instead of sending that reply to someone having credit card problems... I apologize for the mistake, but considering you haven't acknowledged that reply, you must not have received it anyway.
Please follow step 5 and, if needed, step 6 found here:
http://www.gog.com/en/support/support_view/GOG_com_Downloader_issues
This should fix the problem with your Downloader starting minimized.