Check the file YamanoteCommonTypes.xsd in C:\Program Files (x86)\Microsoft Visual Studio 11.0\Xml\Schemas
In that file, cut & paste the following xml defitions over the existing ones:
<xs:simpleType name="ST_ActivationPolicyThirdParty">
<xs:annotation>
<xs:documentation>
The activation policy of a 3rd party task
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:enumeration value="Resume"/>
<xs:enumeration value="Replace"/>
</xs:restriction>
</xs:simpleType>
and
<xs:complexType name="CT_ThirdPartyExtendedAppTask">
<xs:annotation>
<xs:documentation>
Represents an entry point container
</xs:documentation>
</xs:annotation>
<xs:sequence>
<xs:element name="BackgroundServiceAgent" type="CT_BackgroundServiceAgent" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="Name" type="xs:ID" use="required"/>
<!-- These attributes will only be parsed if the runtimetype is ST_RuntimeType::ModernNative -->
<xs:attribute name="ImagePath" type="y:ST_String" use="optional" />
<xs:attribute name="ImageParams" type="y:ST_String" use="optional" />
</xs:complexType>