I might have missed something here, so please correct me if this function already exists.

I would like to be able to export all tracks within one project (or workspace). Not one by one, but all at the same time in one GPX-file, or another Google Earth friendly format. When drawing outlines/ boundaries in programes like Google Earth, it would be very useful to have the tracks shown when drawing. Now I spend quite a bit of time drawing, importing to RM, finding that GE was off by 5-10 meters, correcting in GE, importing in RM, finding another spot that needs correcting etc.

I usually start my mapping by going one round around the lake as close to the shore as I can get my boat. (Deep lakes here in Norway, it can easily be 50 meters deep 10 meters from shore). This gives me correct depths all the way to the shoreline, but a lot of work correcting my boundaries...

You can export multiple tracks, but not "by project" (but that could be a good idea).
To export multiple tracks just multi-select in the asset list and choose "Write to file". The only issue you might have is choosing which tracks to export, if not all tracks are in the project. I suppose one way to help might be to group your tracks in folders which would let you use the "write contents to file" option.
You can also multi-select in the global view using the selection box and use "write selected assets to file" - this way at least you could just draw the rectangle around your project area.

Great, thanks. I guess I have som testing to do later today. :)

Exporting all tracks as GPX seems to do the trick. :)