OK, sounds pretty logical. The car was repainted few month ago, so the nuts of the front extensions shouldn't be rusty at all, cause they were installed just a few weeks ago. At this time the mechanics should have changed the headlight adjuster, but they didn't. As you said, I will try everything not to remove the extensions, but my question was just in case I have to.
First of all I ordered new springs. If i got them installed, I will let check the position of the light. Maybe it's correct and I do not have to change the adjuster at all...