[Error Report]:

[galva12]

Exception Report

SAMM Information:
    Manager Version: 1.2.8
    Current Game: Sonic Adventure DX
    Game Directory: C:\Program Files (x86)\Sonic Adventure DX
    Manager Location: C:\Users\user\Desktop\
    Running as Admin: False

Exception Information:
    Type: UnauthorizedAccessException
    Exception: Access to the path 'C:\Program Files (x86)\Sonic Adventure DX\mods' is denied.
    Source: System.Private.CoreLib
    In Function: Void CreateDirectory(System.String, Byte[])
    StackTrace:    at System.IO.FileSystem.CreateDirectory(String fullPath, Byte[] securityDescriptor)
       at System.IO.Directory.CreateDirectory(String path)
       at SAModManager.Profile.ProfileManager.MigrateProfiles(Boolean deletesource)
       at SAModManager.Profile.ProfileManager.CreateProfiles()
       at SAModManager.MainWindow.Load(Boolean newSetup)
       at SAModManager.MainWindow.DoGameSwap(String newPath)
       at SAModManager.MainWindow.ResultPickGame(String path)
       at SAModManager.MainWindow.btnBrowseGameDir_Click(Object sender, RoutedEventArgs e)
       at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
       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)
       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
       at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
       at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
    --- End of stack trace from previous location ---
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
       at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Windows.Threading.DispatcherOperation.Invoke()
       at System.Windows.Threading.Dispatcher.ProcessQueue()
       at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
       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)
       at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.Run()
       at System.Windows.Application.RunDispatcher(Object ignore)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run()
       at SAModManager.App.Main()

[Sora-yx]

As the error mentions, this is a perm issue, running it as admin should fix your issue.