Problem with render blocking

Hi there,
My page speed analysis tells me that I have some render blocking on my page:

https://www.livelifegreen.de/wp-content/cache/autoptimize/css/autoptimize_d587bd9ed75bab91fcbe15b103417a22.css

https://www.livelifegreen.de/wp-content/cache/autoptimize/css/autoptimize_single_fc9336b81fa712f1a6325867a6cf6e70.css?ver=2.8.1.8.1-758

And I’m not using this one?
https://www.livelifegreen.de/wp-content/cache/autoptimize/css/autoptimize_d587bd9ed75bab91fcbe15b103417a22.css

https://www.livelifegreen.de/wp-content/cache/autoptimize/js/autoptimize_0c70a343652cbb4a911faa533c1ec004.js

I have no clue what this means :-D! Is this something I have to take care of? And if yes, how?

All the best and thanks a lot for your time and effort
Alex

The page I need help with: [log in to see the link]