Problems restoring Lightroom Classic catalog

Hello,

after reinstalling Lightroom Classic, i copied the Lightroom backup zip to "C:\Users\<user>\Pictures\Lightroom an extracted it. Within the Archive there is one file

Lightroom Catalog-2 with 276 Mb filesize.  After starting lightroom there are several files created ( Lightroom Catalog-2.lrcat.lock, Lightroom Catalog-2.lrcat-shm. Lightroom-Catalog-2.lrcat-wal.) But lightroom does not open.

How can i restore my catalog ?

Greetings.