Graphisoft Community

I have imported a IFC and just want to adjust some stuff. For whatever reason it does not display the walls unless I click and select them. It all shows up in 3d view. Any idea how to make them display?  

I found that it is manually possible to draw a zone around multiple zones. I know you can do this in Revit automatically by selecting the zones you already have. Is there a faster way than to draw the zone by hand, say you want to encapsulate a whole...

Every default translator is missing and I can not add a new one either.Can this be because I am in a v25 and the file is made with v22? Should it matter?