Hello,
it is not possible to install multiple NgDesktop instances while using the same name. The installer is creating some entries into registry related to that name (used later by uninstall).
Creating an Ngdesktop Client with a customized name it is possible (and in that case you can install multiple clients with distinct names).
However this imply some major changes related to the way we are currently creating the ngdesktop installer.
Please open a case for this issue.