Many many thanks for your help!
I somehow managed to connect my computer to a network (my computer doesn't has a connection)
So when I started outerra, it downloaded base.desc files and there it was, places were loading successfully. But still there are some places where the ground is blurry and lacks details.
What could cause this ?
EDIT : Now even the places that I had visited earlier (like sundarban delta) and the default location have blurred.