How to completely uninstall 'Weld'

I downloaded the ‘Weld’ extension, but decided to uninstall it. However, every time I import a DXF-file, Sketchup keeps welding it. How do I completely uninstall this extension?

What Weld 3rd-party extension are you referring to ?
The Extension Manager should stop it loading on a restart.
In newer SketchUp versions Weld is now a native tool and can’t be sidestepped.

This one: Weld, join edges and curves into "polylines" By Smustard team

That’s a blast-from-the-past…
There have been many newer ones, and now the native tool.
If you prevent your old-weld from loading you’ll still have the newer native Weld showing in menus etc…

I think the question here really should be, what is happening that you think is welding?

But the problem is that I don’t want any welding to happen, because it keeps messing up my DXF-file when I import it

Well, I’m not that tech-savvy but the same DXF-file (however, redownloaded to make sure the file is not corrupted) has lines connected in different ways than before I installed and uninstalled the ‘Weld’ extension

How long have you been using SketchUp?

FYI (or any new users of SketchUp,) AutoCAD DWG and DXF has lines. Within CAD, such lines can cross each other without interacting.

But SketchUp does not have lines, it has edges. The import of DXF or DWG will convert CAD lines to SketchUp edges. Now, edges in SketchUp will interact geometrically and cause a vertex at any crossing points. Some refer it it as “sticky geometry.”

In order to stay separate within SketchUp, edges must be within another context. (Either a group or component instance.)