I am using Altium v20.2.4 and i have a Multi-board Assembly project from Altium v18.
I am trying to open this document (*.MbaDoc). As it is for an older Altium version i get the info to convert it for the new 3D viewer under Design -> Import.
After clicking OK i have a grey editor. Then i go in the nav bar to Design and there is no Import, just "Import Changes from *.PrjMbd".
Can anyone further assist me how and where i can convert the old Multi-board Assembly project? Am i missing something in the documentation?