Hi
I posted my solution here: How to transform Capella Sample Add-ons into “Effective working Workspaces” in Capella Studio? Without losing any link/info - Capella Studio & Kitalpha - Eclipse Capella Forum (mbse-capella.org)
(My last message)
Essentially, you have to follow the method described by the Capella/obeo Team, using the plug-in method.