I logged in as myself and received the same error. There are two event items logged in the application node of event viewer after the error. I will post below.
ID 1000
Faulting application name: UCA.exe, version: 6.0.327.0, time stamp: 0x53b51238
Faulting module name: KERNELBASE.dll, version: 6.1.7601.18409, time stamp: 0x53159a86
Exception code: 0xe0434352
Fault offset: 0x0000c42d
Faulting process id: 0x1770
Faulting application start time: 0x01cfdf2f965fb35e
Faulting application path: C:\Program Files (x86)\Mitel\Unified Communicator Advanced 6.0\UCA.exe
Faulting module path: C:\windows\syswow64\KERNELBASE.dll
Report Id: d655d07e-4b22-11e4-8979-40a8f052a98c
ID 1026
Application: UCA.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: Common.Logging.ConfigurationException
Stack:
at Common.Logging.Configuration.ArgUtils.Guard[[System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]](Function`1<Int32>, System.String, System.Object[])
at Common.Logging.Configuration.ArgUtils.Guard(Action, System.String, System.Object[])
at Common.Logging.LogManager.BuildLoggerFactoryAdapt er()
at Common.Logging.LogManager.get_Adapter()
at Common.Logging.LogManager.GetLogger[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]()
at Mitel.Communicator.App..ctor()
at Mitel.Communicator.Program.Main()