Hi anytime I install rev-904 or 905, I receive this message:

message:
'.', hexadecimal value 0x00, is an invalid character. Line 12, position 1. (C:\Users\zarke\AppData\Local\DWSIM_Project\DWSIM.exe_Url_tw0azpqpbwmrfr0xl3rr4mxrgu1lz0w2\9.0.0.0\user.config line 12)

call stack:
System.Configuration.ConfigurationErrorsException: '.', hexadecimal value 0x00, is an invalid character. Line 12, position 1. (C:\Users\zarke\AppData\Local\DWSIM_Project\DWSIM.exe_Url_tw0azpqpbwmrfr0xl3rr4mxrgu1lz0w2\9.0.0.0\user.config line 12) ---> System.Xml.XmlException: '.', hexadecimal value 0x00, is an invalid character. Line 12, position 1.
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ParseText(Int32& startPos, Int32& endPos, Int32& outOrChars)
at System.Xml.XmlTextReaderImpl.ParseText()
at System.Xml.XmlTextReaderImpl.ParseElementContent()
at System.Xml.XmlTextReaderImpl.Skip()
at System.Configuration.XmlUtil.StrictSkipToNextElement(ExceptionAction action)
at System.Configuration.BaseConfigurationRecord.ScanSectionsRecursive(XmlUtil xmlUtil, String parentConfigKey, Boolean inLocation, String locationSubPath, OverrideModeSetting overrideMode, Boolean skipInChildApps)
at System.Configuration.BaseConfigurationRecord.ScanSectionsRecursive(XmlUtil xmlUtil, String parentConfigKey, Boolean inLocation, String locationSubPath, OverrideModeSetting overrideMode, Boolean skipInChildApps)
at System.Configuration.BaseConfigurationRecord.ScanSections(XmlUtil xmlUtil)
at System.Configuration.BaseConfigurationRecord.InitConfigFromFile()
--- End of inner exception stack trace ---
at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
at System.Configuration.Configuration..ctor(String locationSubPath, Type typeConfigHost, Object[] hostInitConfigurationParams)
at System.Configuration.ClientConfigurationHost.OpenExeConfiguration(ConfigurationFileMap fileMap, Boolean isMachine, ConfigurationUserLevel userLevel, String exePath)
at System.Configuration.ConfigurationManager.OpenExeConfigurationImpl(ConfigurationFileMap fileMap, Boolean isMachine, ConfigurationUserLevel userLevel, String exePath, Boolean preLoad)
at System.Configuration.ClientSettingsStore.ReadSettingsFromFile(String configFileName, String sectionName, Boolean isUserScoped)
at System.Configuration.LocalFileSettingsProvider.GetSettingValuesFromFile(String configFileName, String sectionName, Boolean userScoped, SettingsPropertyCollection properties)
at System.Configuration.LocalFileSettingsProvider.Upgrade(SettingsContext context, SettingsPropertyCollection properties, Boolean isRoaming)
at System.Configuration.LocalFileSettingsProvider.Upgrade(SettingsContext context, SettingsPropertyCollection properties)
at System.Configuration.ApplicationSettingsBase.Upgrade()
at DWSIM.My.MyApplication.MyApplication_Startup(Object sender, StartupEventArgs e) in C:\Users\danie\source\repos\DanWBR\dwsim\DWSIM\ApplicationEvents.vb:line 66
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnStartup(StartupEventArgs eventArgs)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()