Bug in PDFCreator

I encountered the following bug (after cancelling quicky two print jobs):


Error Report for PDFCreator v2.2.2.1066

Exception:
System.ApplicationException: Object synchronization method was called from an unsynchronized block of code.
   at System.Threading.Mutex.ReleaseMutex()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Environment:
Microsoft Windows NT 6.1.7601 Service Pack 1

Environment variables:
SystemDrive=C:
ProgramFiles(x86)=C:\Program Files (x86)
Path=C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS;C:\WINDOWS\system32;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Python27\;C:\Utilities;C:\Utilities\irsoft;C:\Utilities\Sysinternals;C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\ManagementStudio\;C:\Program Files\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\110\Tools\Binn\;CommonProgramFiles(x86)\Microsoft Shared\Windows Live;CommonProgramFiles(x86)\Ulead Systems\MPEG;C:\Program Files\Intel\iCLS Client\;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x64;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x86;C:\Program Files (x86)\VIDIA Corporation\PhysX\Common;C:\Program Files (x86)\Windows Live\Shared;%CommonProgramFiles%\Microsoft Shared\Windows Live;C:\Program Files (x86)\Toshiba\Bluetooth Toshiba Stack\sys\;C:\Program Files (x86)\Toshiba\Bluetooth Toshiba Stack\sys\x64\;C:\Program Files\Intel\Intel® Management Engine Components\DAL;C:\Program Files\Intel\Intel® Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel® Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel® Management Engine Components\IPT;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;c:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.0\;C:\Program Files\ImageMagick-6.9.3-Q16;C:\Program Files (x86)\gs\gs9.18\bin
ProgramW6432=C:\Program Files
WINDIR=C:\WINDOWS
VBOX_MSI_INSTALL_PATH=C:\Program Files\Oracle\VirtualBox\
TMP=C:\Users\MyUser~1\AppData\Local\Temp
PROCESSOR_ARCHITECTURE=AMD64
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
COMPUTERNAME=MYCOMPUTER
PROCESSOR_REVISION=3a09
TEMP=C:\Users\MyUser~1\AppData\Local\Temp
USERPROFILE=C:\Users\MyUserName
LOGONSERVER=\\MYCOMPUTER
USERNAME=MyUserName
SystemRoot=C:\WINDOWS
PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 58 Stepping 9, GenuineIntel
FP_NO_HOST_CHECK=NO
CommonProgramFiles=C:\Program Files\Common Files
ProgramData=C:\ProgramData
windows_tracing_logfile=C:\BVTBin\Tests\installpackage\csilogfile.log
HOMEPATH=\Users\MyUserName
SESSIONID=1
ALLUSERSPROFILE=C:\ProgramData
CommonProgramW6432=C:\Program Files\Common Files
windows_tracing_flags=3
SESSIONNAME=Console
CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files
HOMEDRIVE=C:
NUMBER_OF_PROCESSORS=8
OS=Windows_NT
ProgramFiles=C:\Program Files
ComSpec=C:\WINDOWS\system32\cmd.exe
VS120COMNTOOLS=C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\Tools\
OPENSSL_CONF=C:\Programs\OpenSSL-Win32\bin\openssl.cfg
PSModulePath=C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\PowerShell\Modules\
APPDATA=C:\Users\MyUserName\AppData\Roaming
USERDOMAIN=MYCOMPUTER
PROCESSOR_LEVEL=6
asl.log=Destination=file
LOCALAPPDATA=C:\Users\MyUserName\AppData\Local
_NT_SYMBOL_PATH=srvDownstreamStorehttp://msdl.microsoft.com/download/symbols
PUBLIC=C:\Users\Public