PDFCreator Error Report

While using PDFCreator, and error message popped up and asked me to copy and paste the error to this forum.

FYI, the PDF print job seemed to work fine – my PDF document was created and looks right.

This also happened to me yesterday. 

How can I fix this error?
=============================================
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:
COMPUTERNAME=401KW7
USERPROFILE=C:\Users\Fred
HOMEPATH=\Users\Fred
LOCALAPPDATA=C:\Users\Fred\AppData\Local
PSModulePath=C:\Windows\system32\WindowsPowerShell\v1.0\Modules\
PROCESSOR_ARCHITECTURE=AMD64
Path=C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\AMD APP\bin\x86_64;C:\Program Files (x86)\AMD APP\bin\x86;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;“C:\Program Files (x86)\PKWARE\pkzipc”;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\Common Files\Intuit\QBPOSSDKRuntime;C:\Program Files\OpenVPN\bin;C:\Program Files (x86)\Calibre2\;C:\Program Files (x86)\QuickTime\QTSystem\;C:\Program Files (x86)\Skype\Phone\
CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files
ProgramFiles(x86)=C:\Program Files (x86)
PROCESSOR_LEVEL=16
windows_tracing_flags=3
LOGONSERVER=\\401KW7
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
HOMEDRIVE=C:
SystemRoot=C:\Windows
SESSIONNAME=Console
ALLUSERSPROFILE=C:\ProgramData
PUBLIC=C:\Users\Public
FP_NO_HOST_CHECK=NO
APPDATA=C:\Users\Fred\AppData\Roaming
PROCESSOR_REVISION=0a00
USERNAME=Fred
CommonProgramW6432=C:\Program Files\Common Files
ESET_OPTIONS=                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
CommonProgramFiles=C:\Program Files\Common Files
OS=Windows_NT
AMDAPPSDKROOT=C:\Program Files (x86)\AMD APP\
PROCESSOR_IDENTIFIER=AMD64 Family 16 Model 10 Stepping 0, AuthenticAMD
ComSpec=C:\Windows\system32\cmd.exe
SystemDrive=C:
TEMP=C:\Users\Fred\AppData\Local\Temp
ProgramFiles=C:\Program Files
NUMBER_OF_PROCESSORS=6
SESSIONID=1
windows_tracing_logfile=C:\BVTBin\Tests\installpackage\csilogfile.log
TMP=C:\Users\Fred\AppData\Local\Temp
ProgramData=C:\ProgramData
ProgramW6432=C:\Program Files
windir=C:\Windows
USERDOMAIN=401KW7