This first image is a complete mess. It looks as if the whole thing has been messed up, which is as mildly as I can put it. You need some one who knows what they're doing to sit down with you and walk you through this and help you sort it out.
The first image shows what looks like the root level of the external drive, where the new library has been placed together with the saved files. However there is a .fcpproject file and a .fcpevent file at the root level of the drive, which have absolutely no business being there, and unless you know exactly how they got there, or where they came from, they are not recoverable.
I have no idea what the New German folder is or where it is, but it should not normally have an .fcpproject file and an .fcpevent file in the same folder. Showing everything is icon view is completely unhelpful because there is no information at all where any folder resides or what the folder structure is, which is critical to working with older versions of FCP 10.0.x. (BTW you still have never said that versions of the software you're dealing with, what current version of FCP and what old version of FCP.)
It would probably be a good idea to stop hacking files to open them. Don't bother with looking in the render files. They're irrelevant, and the least of your problems.