Extra lines on DXF drawing

I'm pretty new to cad drawing and have a problem with a DXF-file I've received.

Some of the lines extends to som kind of origo in stead of just ending at a corner. Is there an easy way to delete these extra points without deleting the parts/points on the line, that should be there?

From the Faq: The DXF import process failed, why?

LibreCAD does not support all features of Autodesk DXF format. Currently, only the following DXF formats are supported: R12, R14, 2000, 2004 and 2007.

So the support to dxf is quite minimal,  I would not use it in LibreCAD.

It seems you use an older Version of LC, which has a bug producing the artefacts you see. If you upgrade to V 2.2.0 they maybe gone.
You also can just delete these lines. The objects touching the lines will not be affected, I think.

Thanks
I probably will try upgrading Librecad.
Deleting the lines deletes part of the drawings itself also, as they are part of it. I thougt i could just delete the point the line in 0,0 and it would be fixed, but i cant figure out how to do this.
All i all I'm starting to think it will be easier just to make the drawings from scratch, as I have all the dimensions on hand.