I haven't had any issues, and now all of the sudden when I launch ATVO, I get a message saying "configuration system failed to initialize". Quick help would be preferred since I intend on using ATVO to broadcast the iRacing 24 Hours at Le Mans this weekend. Here's the log:
Unhandled exception
System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: '.', hexadecimal value 0x00, is an invalid character. Line 6, position 1. (C:\Users\Jakers\AppData\Local\appgineer.in\ATVO.exe_Url_k1lzrspgqkqvnupynbizugng1ad3zrn2\1.29.12.0\user.config line 6) ---> System.Xml.XmlException: '.', hexadecimal value 0x00, is an invalid character. Line 6, 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.Configuration.XmlUtil.StrictReadToNextElement(ExceptionAction action)
at System.Configuration.BaseConfigurationRecord.ScanFactoriesRecursive(XmlUtil xmlUtil, String parentConfigKey, Hashtable factoryList)
at System.Configuration.BaseConfigurationRecord.ScanFactoriesRecursive(XmlUtil xmlUtil, String parentConfigKey, Hashtable factoryList)
at System.Configuration.BaseConfigurationRecord.ScanFactories(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.ClientConfigurationSystem.OnConfigRemoved(Object sender, InternalConfigEventArgs e)
--- End of inner exception stack trace ---
at System.Configuration.ClientConfigurationSystem.OnConfigRemoved(Object sender, InternalConfigEventArgs e)
at System.Configuration.Internal.InternalConfigRoot.OnConfigRemoved(InternalConfigEventArgs e)
at System.Configuration.Internal.InternalConfigRoot.RemoveConfigImpl(String configPath, BaseConfigurationRecord configRecord)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Configuration.ClientSettingsStore.ReadSettings(String sectionName, Boolean isUserScoped)
at System.Configuration.LocalFileSettingsProvider.GetPropertyValues(SettingsContext context, SettingsPropertyCollection properties)
at System.Configuration.SettingsBase.GetPropertiesFromProvider(SettingsProvider provider)
at System.Configuration.SettingsBase.GetPropertyValueByName(String propertyName)
at System.Configuration.SettingsBase.get_Item(String propertyName)
at System.Configuration.ApplicationSettingsBase.GetPropertyValue(String propertyName)
at System.Configuration.ApplicationSettingsBase.get_Item(String propertyName)
at ATVO.Properties.Settings.get_UpgradeRequired() in D:\Users\Nick\Documents\Programming\ATVO\Appgineer.in-TV-Overlay-for-iRacing\ATVO\Properties\Settings.Designer.cs:line 31
at ATVO.App.OnStartup(StartupEventArgs e) in D:\Users\Nick\Documents\Programming\ATVO\Appgineer.in-TV-Overlay-for-iRacing\ATVO\App.xaml.cs:line 45
at System.Windows.Application.<.ctor>b__1_0(Object unused)
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)

Your settings file has somehow been corrupted.

Can you send us this file:
C:\Users\Jakers\AppData\Local\appgineer.in\ATVO.exe_Url_k1lzrspgqkqvnupynbizugng1ad3zrn2\1.29.12.0\user.config

It should contain your ATVO settings.
I think you can just put the contents here but please review to make sure there are no things in there you don't want to share.

If you delete that folder (the one starting with "ATVO.exe_...") and restart, it should fix itself. But you will lose your settings.

You must go to "C:\Users\Jakers\AppData\Local\appgineer.in\ATVO.exe_Url_k1lzrspgqkqvnupynbizugng1ad3zrn2\1.29.12.0\user.config"
Open de file with a text editor like notepad++
Go to line 6 and change the value 0x00 with a valid value.
Save the file and after you will can open the atvo

Thank you for the folder help, everything is back up and running well. Here's what the inside of the config file was:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<sectionGroup name="userSettings">
<section name="MahApps.Metro.Controls.WindowApplicationSettings.ATVO.CameraControls.Views.CameraButtonBox" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />