卸载/安装新软件包版本后，Visual Studio独立Shell工具箱未更新

I am developing a DSL package that has a number of toolbar items. If I add a new toolbar item in the DSL explorer install the new package into the Visual Studio isolated shell the new items don't appear. I am testing this on a virtual machine first by installing the first version of the package, uninstalling it and then installing the updated version. It seems that the system is somehow caching the old toolbar settings, etc even though a new version of the DSL package assembly is being installed.I am developing a DSL package that has a number