Blender should not only be installed but should be the default registered application for .blend files.
If you're having problems with it, recommend perhaps installing a newer version of blender.
If FBX export is the route you want to go, there's some modifiers you can change on the FBX export screen (eg. FBX units scale) , but at the moment I don't know the exact settings. Once I have an opportunity to check it I can comment again, unless you figure it out before then.
