For the Bella Standalone...that works also but I'm not gifted...i must miss something!
All is imported but I success only to render a "Sphere"who has nothing to do with the model above! :) ( Export / Import DAE from SketchUp )

I have found :) I must make a big Zoom out...Scale is not automatic or maybe not by default! :)

And apply materials is not evident: there a little problem of Path so for the moment only one texture! :)
That is not very clear as process!