Created Unassigned: DateTimePicker crash [21963]

```
A first chance exception of type 'System.Windows.Markup.XamlParseException' occurred in PresentationFramework.dll

Additional information: 'Set property 'Xceed.Wpf.Toolkit.Primitives.UpDownBase(System.Nullable(System.DateTime)).Value' threw an exception.' Line number '68' and line position '37'.
```
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Attemping to use DateTimePicker, or any of the DateTime* causes it to crash.
Any form for parameters cause the same to happen.

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Tried install the Toolkit Plus edition, and then i did not get the error.