DeploymentCatalog does not seem to consume the proper version of XAP package.
in fact when the application start and an extension (xap package) is loaded the first time composition works fine, but if I drop a newer version of the xap package and try to reload it the re-composition seems the produce the same old result.
do DeployementCatalog use a cached version of the xap package ?
I inspected through Chrome and I saw a request is made to load the new version, however when I changed the version of the assemblies in the package re-composition failed with "Object reference set to null" !!!!!