I thought MTK required Net Framework v3.5 to be installed. Errors appear to be v4 related. (I'm a noob and trying to help, if I am way off base here, forgive me).
Nope...MTK requires .NET 4 to be installed. Code: Requirements: Microsoft .NET Framework 4.0 or 4.5 (Not 3.5) Microsoft Office 2010 or Later for Office Toolkit Support Windows Vista or Later for Windows Toolkit Support