Crash on startup

ever since RDM updated itself to the latest version, it crashes on startup. This is on an XP SP3 system.

ConfigurationErrorsException - Configuration system failed to initialize

at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
at System.Configuration.ClientConfigurationSystem.PrepareClientConfigSystem(String sectionName)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName)
at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection()
at System.Diagnostics.DiagnosticsConfiguration.Initialize()
at System.Diagnostics.DiagnosticsConfiguration.get_SwitchSettings()
at System.Diagnostics.Switch.InitializeConfigSettings()
at System.Diagnostics.Switch.InitializeWithStatus()
at System.Diagnostics.Switch.get_SwitchSetting()
at System.Diagnostics.BooleanSwitch.get_Enabled()
at System.Xml.Serialization.TempAssembly.LoadGeneratedAssembly(Type type, String defaultNamespace, XmlSerializerImplementation& contract)
at System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)
at System.Xml.Serialization.XmlSerializer..ctor(Type type)
at Devolutions.RemoteDesktopManager.Managers.SerializationManager.GetSerializer(Type type)
at Devolutions.RemoteDesktopManager.Managers.SerializationManager.LoadObjectFromFile(String aFileName, Type aType, Boolean aCreateAnInstanceIfNotExists)
at Devolutions.RemoteDesktopManager.Managers.OptionManager.LoadOptions()
at Devolutions.RemoteDesktopManager.Program.Main(String[] aArgs)

------------------------------------------

ConfigurationErrorsException - Unrecognized configuration section system.serviceModel. (C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Config\machine.config line 136)

at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
at System.Configuration.BaseConfigurationRecord.ThrowIfInitErrors()
at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)