Delete all Library, not only local files

[luigimusicc]

Hello Community,

I've been looking for this topic but I haven't not found a solution yet. 

I want to detele all my library to start from scratch. I don't have local files but just close to 10000 songs in the "Title" menu. I can select all of them (cmd+A) but can't delete them. I can only delete one title at the time which is not option considering the number to delete...

Can somebody help please?

Many Thanks,

Luigi

I'm using Spotify Desktop on mac os high sierra.