After Upgrading

After upgrading, from 5 to 6 I get this dialogbox, why? and how to get rid of it. It turns up on all drawings and also after saving as 6 version.

That means the file is looking for an image file that V6 can not find.
It’s giving you a chance to locate the missing file and telling you where it used to be.
Did you move the V6 files to this computer?