I honestly don't know how to do that. Thanks for clarifying.
That come as an shock to me, I believed that every one that are using a computer in this world, do know how to change the type of file they want to save there documents/drawings as. but then I might have a bit to much luxury, by living in Norway.
This one is perhaps a bit harsh, but making this, on a Monday morning when the brain is still in the sink! yeah, always fun to do: