FlashGot doesn't find any download managers

[Angel]

Recently there is an error occurred - FlashGot stopped recognizing any download managers. Tried to reinstall, clean profile, fully remove Firefox and any of its settings - all futile. Found similar topics, but they were referred to non-ASCII characters to profile path or temp path (in my case there is only spaces of semi-standard characters in "Documents and settings" folder name) or were fixed in previous builds (tried few previous versions of FlashGot, but problem still appeared).
System: Windows XP SP3, Firefox 3.6.24, FlashGot 1.3.5, Free Download Manager 3.8 RC3
Due to log, it looks like some error during initialization, but file FlashGot.exe.test in temp folder is created and has among many lines:

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FlashGot Win Bridge 1.2.0.4
......
Free Download Manager|OK
......

flashgot.log

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*** FlashGot 1.3.5 started at Sat, 03 Dec 2011 03:52:05 GMT ***
Per-session init started
Per-session init done in 2ms
Running D:\Documents and Settings\Angel\Application Data\Mozilla\Firefox\Profiles\bm195wef.default\FlashGot.exe -o D:\Temp\flashgot.bm195wef.default\FlashGot.exe.test -- blocking
Error running native executable:
D:\Documents and Settings\Angel\Application Data\Mozilla\Firefox\Profiles\bm195wef.default\FlashGot.exe -o D:\Temp\flashgot.bm195wef.default\FlashGot.exe.test
Component returned failure code: 0x80520003 (NS_ERROR_FILE_EXECUTION_FAILED) [nsIProcess.run]
Native execution time 353
Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIFileInputStream.init]
Warning: download manager wxDownload Fast not found
No *X shell: Component returned failure code: 0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsILocalFile.initWithPath]
Warning: download manager Wget not found
Warning: download manager WellGet not found
Warning: download manager Uget not found
Warning: download manager TrueDownloader not found
Warning: download manager Thunder (Old) not found
Warning: download manager Thunder not found
Warning: download manager Steadyflow not found
Warning: download manager Star Downloader not found
Warning: download manager Speed Download Lite not found
Warning: download manager Speed Download not found
Warning: download manager Retriever not found
Warning: download manager ReGet not found
Warning: download manager Prozilla not found
Warning: download manager Orbit not found
Warning: download manager NetAnts not found
Warning: download manager Net Transport 2 not found
Warning: download manager Net Transport not found
Warning: download manager Mass Downloader not found
Warning: download manager LeechGet 2002 not found
Warning: download manager LeechGet not found
Warning: download manager Leech not found
Warning: download manager KDE KGet not found
Warning: download manager JDownloader not found
Warning: download manager Internet Download Manager not found
Warning: download manager Internet Download Accelerator not found
Warning: download manager InstantGet not found
Warning: download manager iGetter Win not found
Warning: download manager iGetter not found
Warning: download manager HiDownload not found
Warning: download manager GNOME Gwget not found
Warning: download manager GigaGet not found
Warning: download manager GetRight not found
Warning: download manager FreshDownload not found
Warning: download manager Free Download Manager not found
Warning: download manager Folx not found
Warning: download manager FlashGet 2.x not found
Warning: download manager FlashGet 2 not found
Warning: download manager FlashGet not found
Warning: download manager FatRat not found
Warning: download manager DTA (Turbo) not found
Warning: download manager DTA not found
Warning: download manager DownloadStudio not found
Warning: download manager Downloader 4 X (nt) not found
Warning: download manager Downloader 4 X not found
Warning: download manager Download Master not found
Warning: download manager Download Accelerator Plus not found
Warning: download manager cURL not found
Warning: download manager BitComet not found
Warning: download manager Axel not found
Warning: download manager Aria 2 not found
Warning: download manager Aria not found
Download managers detection done in 356ms
JDownloader response:
0

Thanks for any help!

[Giorgio Maone]

Does disabling your antivirus/personal firewall help?

[Angel]

No, turning off my DrWeb didn't help. Also there are no restrictions in security permissions and user is administrator. Forgot to mention it earlier. Logging in with another new user doesn't solve the problem too.

On my second computer all soft, settings etc are identical, but it works there normally. And I don't remember updating, installing or making anything significant to the system before the problem occures.