Can't Install Synapse on Win 10

Starts with a black square and then crashes:

Application: RazerInstaller.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.NotImplementedException
at MS.Win32.UnsafeNativeMethods+ITfThreadMgr.CreateDocumentMgr(ITfDocumentMgr ByRef)
at System.Windows.Input.TextServicesContext.RegisterTextStore(System.Windows.Input.DefaultTextStore)
at System.Windows.Input.DefaultTextStore.get_Current()
at System.Windows.Input.TextServicesContext.SetFocusOnDefaultTextStore()
at System.Windows.Input.InputMethod.EnableOrDisableInputMethod(Boolean)
at System.Windows.Input.TextServicesManager.Focus(System.Windows.DependencyObject)
at System.Windows.Input.KeyboardDevice.ChangeFocus(System.Windows.DependencyObject, Int32)
at System.Windows.Input.KeyboardDevice.TryChangeFocus(System.Windows.DependencyObject, System.Windows.Input.IKeyboardInputProvider, Boolean, Boolean, Boolean)
at System.Windows.Input.KeyboardDevice.Focus(System.Windows.DependencyObject, Boolean, Boolean, Boolean)
at System.Windows.Input.KeyboardDevice.Focus(System.Windows.IInputElement)
at System.Windows.Interop.HwndKeyboardInputProvider.OnSetFocus(IntPtr)
at System.Windows.Interop.HwndKeyboardInputProvider.FilterMessage(IntPtr, MS.Internal.Interop.WindowMessage, IntPtr, IntPtr, Boolean ByRef)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)



Faulting application name: RazerInstaller.exe, version: 1.0.148.188, time stamp: 0x5fa90a07
Faulting module name: KERNELBASE.dll, version: 10.0.19041.662, time stamp: 0xe6477cce
Exception code: 0xe0434352
Fault offset: 0x0012a892
Faulting process id: 0x45a4
Faulting application start time: 0x01d6d4dbd4806e96
Faulting application path: C:\\Windows\\Installer\\Razer\\Installer\\App\\RazerInstaller.exe
Faulting module path: C:\\Windows\\System32\\KERNELBASE.dll
Report Id: 5f8f4e46-043d-4edc-b76c-b50808f316a5
Faulting package full name:
Faulting package-relative application ID: