Error Log report

23/10/2016 6:49:30 PM: DEBUG - Checking if the PSO2 Tweaker is running
23/10/2016 6:49:30 PM: DEBUG - Program started! - Logging enabled!
23/10/2016 6:49:30 PM: DEBUG - Attempting to auto-load pso2_bin directory from settings
23/10/2016 6:49:30 PM: DEBUG - Loaded pso2_bin directory from settings
23/10/2016 6:49:30 PM: DEBUG - Pursuing freedom...
23/10/2016 6:49:31 PM: DEBUG - Loading settings...
23/10/2016 6:49:31 PM: DEBUG - Load more settings...
23/10/2016 6:49:31 PM: DEBUG -

23/10/2016 6:49:31 PM: DEBUG - ----------------------------------------
23/10/2016 6:49:31 PM: DEBUG - Program opening, running diagnostics...
23/10/2016 6:49:31 PM: DEBUG - Current OS Full name: Microsoft Windows 7 Professional
23/10/2016 6:49:31 PM: DEBUG - Current OS Version: 6.1.7600.0
23/10/2016 6:49:31 PM: DEBUG - Is the current OS 64-bit? False
23/10/2016 6:49:31 PM: DEBUG - Directory program is running in: D:\Program Files\PSO2JP
23/10/2016 6:49:31 PM: DEBUG - Selected PSO2 Directory: D:\Program Files\PSO2JP\PHANTASYSTARONLINE2\pso2_bin
23/10/2016 6:49:31 PM: DEBUG - Run as Administrator: True
23/10/2016 6:49:31 PM: DEBUG - Is 7zip available: False
23/10/2016 6:49:31 PM: DEBUG - Is Unrar Available: False
23/10/2016 6:49:31 PM: DEBUG - ----------------------------------------
23/10/2016 6:49:32 PM: DEBUG - Loading color stuff...
23/10/2016 6:49:32 PM: ERROR -  - System.TypeLoadException: System.TypeLoadException: Could not load type 'System.Runtime.CompilerServices.IAsyncStateMachine' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
   at PSO2_Tweaker.FrmMain.
(Object , EventArgs )
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at DevComponents.DotNetBar.Office2007RibbonForm.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message