GOG downloader 3.0 stable told me I have a game update, I clicked on it and it opened my game library in my browser (which required I log in).
In the large picture mode it did not clearly indicate which game was updated, so I switched to list view and found out it was the witcher enhanced edition..

I started the download and it automatically created a subfolder called "the_witcher"
That's a rather sad looking name for a subfolder in my downloading directory, I personally labeled the folder "The Witcher Enhanced Edition (2008) [GOG]"

1. Would be great if you could specify folder naming rules with things like $Date for year of release and so on.
2. Would be great if one of those rules included disabling the linux friendly aspects of using only lower case letters and replacing space with _. For example:
$n = short name, linux style. "the_witcher"
$N = short name, windows style. "The Witcher"
$name = long name, linux style. "the_witcher_enhanced_edition
$Name = Long name, windows style. "The Witcher Enhanced Edition
$Name8 = Long name in UTF8 (unicode) which includes special characters such as colon or asian script or what have you. "The Witcher: Enhanced Edition" (it should be noted that trying to name something with : in windows will fail with an error message if it is done in ASCII, which is the default when typing it from a keyboard, but if you copy paste the unicode symbol in it will save the filename in unicode which will allow the file to contain such special characters, and will work with no issue)

don't know if anyone mentioned this yet: I tried to download a game (whispered world) with the download director pointed to the wrong drive. my C drive didn't have enough room on it so the downloader stopped the download, but now I have the game stuck on my queue and can't get it off even though I pointed the download location to me D drive (which is bigger).

trying to redownload the game didn't work, I'll try completely closing out the downloader and restarting in just a sec, but what it looks like for now is that the game is stuck in there without a "retry download" function to be found.

hi, i just downloaded the latest version and it doesnt work.
it starts and then requires a login, well it always says username or password wrong..
log:

CPU with 1 core(s) found:
CPU0: 2144 MHz for AMD Athlon(tm) XP 2600+
Memory: 1073201152
OS Version: Microsoft Windows NT 5.1.2600 Service Pack 3
Language: Italian (Italy)
Drive C:\ has 32346767360 bytes available
1346265191 Log started
Number of threads: 6
Download path: C:\Documents and Settings\jj letoz\Documenti\GOG.com Downloads
Automatic launch of installers: False
Downloader installed to: C:\Programmi\GOG.com\
Downloader starts with Windows: False
1346265191 init started
1346265191 Worker 1 Requesting https://api.gog.com/en/downloader2/status/stable/3.0.52
App online: True
1346265192 Init ended
1346265192 Login started
1346265232 Requesting https://api.gog.com/en/oauth/initialize/
1346265234 Requesting https://api.gog.com/en/oauth/login/
Message: Errore del server remoto: (403) Non consentito.
Stack trace: in System.Net.HttpWebRequest.GetResponse()
in GOGCompanionApp.ConnectionManager.MakeRequest(String uri, String method, String postedData)
Inner exception:
Requested URL: https://api.gog.com/en/oauth/login/
Error code: Forbidden
<h1>Error 403 - Access Forbidden (Array)</h1>


Message: Index non compreso nell'intervallo. Richiesto valore non negativo e minore della dimensione dell'insieme.
Nome parametro: index
Stack trace: in System.Collections.ArrayList.get_Item(Int32 index)
in System.Collections.Specialized.NameObjectCollectionBase.BaseGet(Int32 index)
in System.Collections.Specialized.NameValueCollection.Get(Int32 index)
in System.Collections.Specialized.NameValueCollection.get_Item(Int32 index)
in GOGCompanionApp.OAuthRequests.authorizeTempToken(String email, String password, String oauth_token, String oauth_token_secret)
Inner exception:
1346265244 Requesting https://api.gog.com/en/oauth/initialize/
1346265245 Requesting https://api.gog.com/en/oauth/login/
Message: Errore del server remoto: (403) Non consentito.
Stack trace: in System.Net.HttpWebRequest.GetResponse()
in GOGCompanionApp.ConnectionManager.MakeRequest(String uri, String method, String postedData)
Inner exception:
Requested URL: https://api.gog.com/en/oauth/login/
Error code: Forbidden
<h1>Error 403 - Access Forbidden (Array)</h1>


Message: Index non compreso nell'intervallo. Richiesto valore non negativo e minore della dimensione dell'insieme.
Nome parametro: index
Stack trace: in System.Collections.ArrayList.get_Item(Int32 index)
in System.Collections.Specialized.NameObjectCollectionBase.BaseGet(Int32 index)
in System.Collections.Specialized.NameValueCollection.Get(Int32 index)
in System.Collections.Specialized.NameValueCollection.get_Item(Int32 index)
in GOGCompanionApp.OAuthRequests.authorizeTempToken(String email, String password, String oauth_token, String oauth_token_secret)
Inner exception:
Closing Downloader

ok i found the problem: the use of special characters...

When I run the latest stable version, I cannot view the actual Window. It remains minimized no matter how much I click it. With Aero Peek (Win 7 64 bit) I can view what it is downloading in a smaller fashion, but it never becomes the active window.

This is after restarting the pc and the program.

How do I resolve this?

DxDiag Info:

------------------
System Information
------------------
Time of this report: 8/30/2012, 15:19:32
Machine name: HERCULES
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120503-2030)
Language: English (Regional Setting: English)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: GA-770T-USB3
BIOS: Award Modular BIOS v6.00PG
Processor: AMD Phenom(tm) II X2 555 Processor (2 CPUs), ~3.2GHz
Memory: 8192MB RAM
Available OS Memory: 8188MB RAM
Page File: 2249MB used, 14125MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11


---------------
Display Devices
---------------
Card name: NVIDIA GeForce GTX 460
Manufacturer: NVIDIA
Chip type: GeForce GTX 460
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0E22&SUBSYS_00000000&REV_A1
Display Memory: 4065 MB
Dedicated Memory: 993 MB
Shared Memory: 3071 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: Acer S231HL(Analog)
Monitor Model: Acer S231HL
Monitor Id: ACR01A6
Native Mode: 1920 x 1080(p) (60.000Hz)
Output Type: HDMI
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 8.17.0012.9573 (English)
Driver Version: 8.17.12.9573
Driver Date/Size: 2/9/2012 22:43:00, 17642816 bytes

snippet of GOG Log before downloading logs began:

CPU with 2 core(s) found:
CPU0: 3218 MHz for AMD Phenom(tm) II X2 555 Processor
CPU1: 3218 MHz for AMD Phenom(tm) II X2 555 Processor
Memory: 8585904128
OS Version: Microsoft Windows NT 6.1.7601 Service Pack 1
Language: English (United States)
Drive C:\ has 900089536512 bytes available
1346119450 Log started
Number of threads: 6
Download path: C:\Games\Gog Games
Automatic launch of installers: True
Downloader installed to: C:\Program Files (x86)\GOG.com\
Downloader starts with Windows: False
1346119451 init started
1346119451 Worker 1 Requesting https://api.gog.com/en/downloader2/status/stable/3.0.52
App online: True
1346119451 Init ended
Clicked URL: gogdownloader://theme_hospital/
1346119452 Login started
1346119452 Requesting https://api.gog.com/en/downloader2/user/stable/3.0.52
1346119452 User deathsbedbug logged in
1346119452 Deserialization started
1346119452 Deserialization ended
1346119452 Login ended

I can't recall ever seeing the downloader minimized. It will either close to tray or be displayed. There is though the possibility that it is displayed so far off screen that it appears invisible. Try shift-right clicking it, and choosing move, then use the cursor keys to see if you can bring it back to the desktop. Alternatively, alt-space, move instead of shift-right clicking.

JMich, you are awesome! :D That worked! It was hiding off the bottom of the screen.

No worries, had it happen before with various programs. Enjoy your games, and hope you don't get any more reasons to post in this thread :)

I second this suggestion!

Nevermind, I found out how to download using the gog downloader. I thought it was automatic like steam

Download and install the downloader from this page. Then when you get to your account page, you should have the option of turning the downloader on or off (see attached pictures). If it's set to on, you should be able to download through the downloader. There is a small chance that your browser may not correctly parse the downloader links, if that is the case, post which browser you are using and I'll try to find the link explaining how to correct it.
Welcome to the GOG.com forums, enjoy your stay.
Edit: Glad to see you sorted it out, will leave this post in case others encounter the same problem.

Thanks for the help. I thought it was enabled automatically:)