ERROR - Activate this feature?

date/time : 2012-02-21, 10:21:01, 2ms
computer name : Y*******
user name : y*******
registered owner : kullanici
operating system : Windows XP Service Pack 3 build 2600
system language : Turkish
system up time : 51 minutes 11 seconds
program up time : 9 seconds
processor : Intel(R) Pentium(R) 4 CPU 2.53GHz
physical memory : 609/1015 MB (free/total)
free disk space : (C:) 1,92 GB
display mode : 1280x1024, 32 bit
process id : $378
allocated memory : 7,75 MB
executable : heidisql.exe
exec. date/time : 2010-01-30 11:37
version : 5.0.0.3031
compiled with : Delphi 2010
madExcept version : 3.0k
callstack crc : $9650eebe, $4116c0d2, $4116c0d2
exception number : 1
exception class : ERegistryException
exception message : Failed to set data for 'DoUsageStatistics'.

main thread ($ec4):
004a57f7 +063 heidisql.exe Registry TRegistry.PutData
004a5598 +00c heidisql.exe Registry TRegistry.WriteInteger
004a55d3 +003 heidisql.exe Registry TRegistry.WriteBool
00672ba1 +3a9 heidisql.exe Main 1466 +64 TMainForm.Startup
007148c9 +0cd heidisql.exe heidisql 63 +17 initialization

thread $fdc:
7c8fdf48 +a ntdll.dll NtWaitForMultipleObjects

thread $ddc (TWorkerThread):
7c8fdf58 +0a ntdll.dll NtWaitForSingleObject
7c8025d5 +85 kernel32.dll WaitForSingleObjectEx
7c80253d +0d kernel32.dll WaitForSingleObject
005cc90d +19 heidisql.exe VirtualTrees TWorkerThread.Execute
0046085f +2b heidisql.exe madExcept HookedTThreadExecute
0049790e +42 heidisql.exe Classes ThreadProc
004067f8 +28 heidisql.exe System 1125 +0 ThreadWrapper
00460741 +0d heidisql.exe madExcept CallThreadProcSafe
004607ab +37 heidisql.exe madExcept ThreadExceptFrame
>> created by main thread ($ec4) at:
005cc802 +16 heidisql.exe VirtualTrees TWorkerThread.Create

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I'm new on HeidiSQL and also MySQL. Using them for 7 months. I got this error this morning and can't open. Can you help me about that? I got huge database (and so important) on it.

Waiting your quick replies. Thank you for your help.

With my best regards,

> version : 5.0.0.3031

Man, this is an horribly old release. Please update to 7.0.