Crash on changing active connections

date/time          : 2014-10-26, 22:27:28, 75ms
computer name      : XXXXX
user name          : XXXXX
registered owner   : XXXXX
operating system   : Windows 8 x64 build 9200
system language    : Polish
system up time     : 18 days 6 hours
program up time    : 4 hours 46 minutes
processors         : 4x Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz
physical memory    : 2804/5941 MB (free/total)
free disk space    : (C:) 65,31 GB (D:) 16,01 GB
display mode       : 1600x900, 32 bit
process id         : $3104
allocated memory   : 110,75 MB
largest free block : 131029,99 GB
executable         : heidisql.exe
exec. date/time    : 2014-03-07 19:57
version            : 8.3.0.4722
compiled with      : Delphi XE5
madExcept version  : 4.0.8.1
callstack crc      : $54d9c2f2, $bca013fe, $bca013fe
exception number   : 1
exception class    : Unknown
exception message  : Unknown.
main thread ($1c18):
00a7e8a2 heidisql.exe dbconnection   4277 +35 TMySQLQuery.Col
7fff2671 user32.dll                           GetMessageW
004ec526 heidisql.exe madExcept               HandleException
004f9044 heidisql.exe madExcept               InterceptAHandleExcept
00699b9e heidisql.exe Vcl.Controls            TWinControl.MainWndProc
005da4b3 heidisql.exe System.Classes          StdWndProc
7fff284b ntdll.dll                            KiUserCallbackDispatcher
7fff2671 user32.dll                           DispatchMessageW
004ec559 heidisql.exe madExcept               HandleException
004f9044 heidisql.exe madExcept               InterceptAHandleExcept
00699b9e heidisql.exe Vcl.Controls            TWinControl.MainWndProc
005da4b3 heidisql.exe System.Classes          StdWndProc
7fff284b ntdll.dll                            KiUserCallbackDispatcher
7fff2671 user32.dll                           DispatchMessageW
00812d8f heidisql.exe Vcl.Forms               TApplication.ProcessMessage
00812e03 heidisql.exe Vcl.Forms               TApplication.HandleMessage
008132ef heidisql.exe Vcl.Forms               TApplication.Run
00c468fe heidisql.exe heidisql         76 +23 initialization
7fff25df KERNEL32.DLL                         BaseThreadInitThunk
7fff2847 ntdll.dll                            RtlUserThreadStart