Hey there,
If you hit F1 and Import (Add Folder) an external .class file, e.g. from your Projects' path, the reference stays in the Project.
BUT: when you close the Project and open it again the path to the .class file is marked red and the message
Could not open!
appears.
'It might be a BUG in Jabaco!
You have to Import that class every time again; it does not stay in the Imports Window!
Dani