Exceptions on 2017.1 in .Net 4.6

[StanleyGoldman]

ArgumentException: parsing "^(?<active>\*)?\s+(?<name>[\w\d\/\-_]+)\s*(?:[a-z|0-9]{7} \[(?<tracking>[\w\d\/\-\_]+)\])?" - Unrecognized escape sequence \_.
System.Text.RegularExpressions.RegexParser.ScanCharEscape () (at <f044fe2c9e7e4b8e91984b41f0cf0b04>:0)
System.Text.RegularExpressions.RegexParser.ScanCharClass (System.Boolean caseInsensitive, System.Boolean scanOnly) (at <f044fe2c9e7e4b8e91984b41f0cf0b04>:0)
System.Text.RegularExpressions.RegexParser.CountCaptures () (at <f044fe2c9e7e4b8e91984b41f0cf0b04>:0)
System.Text.RegularExpressions.RegexParser.Parse (System.String re, System.Text.RegularExpressions.RegexOptions op) (at <f044fe2c9e7e4b8e91984b41f0cf0b04>:0)
System.Text.RegularExpressions.Regex..ctor (System.String pattern, System.Text.RegularExpressions.RegexOptions options, System.TimeSpan matchTimeout, System.Boolean useCache) (at <f044fe2c9e7e4b8e91984b41f0cf0b04>:0)
System.Text.RegularExpressions.Regex..ctor (System.String pattern) (at <f044fe2c9e7e4b8e91984b41f0cf0b04>:0)
GitHub.Unity.Utility..cctor () (at C:/Users/Spade/Projects/GitHub/Unity_master/src/UnityExtension/Assets/Editor/GitHub.Unity/Misc/Utility.cs:17)
Rethrow as TypeInitializationException: The type initializer for 'GitHub.Unity.Utility' threw an exception.
GitHub.Unity.Styles.get_SmallLogo () (at C:/Users/Spade/Projects/GitHub/Unity_master/src/UnityExtension/Assets/Editor/GitHub.Unity/Misc/Styles.cs:681)
GitHub.Unity.Window.OnEnable () (at C:/Users/Spade/Projects/GitHub/Unity_master/src/UnityExtension/Assets/Editor/GitHub.Unity/UI/Window.cs:95)
UnityEditorInternal.InternalEditorUtility:LoadSerializedFileAndForget(String)
UnityEditor.WindowLayout:LoadWindowLayout(String, Boolean)