The biggest problem that I have with this "new" UI is that I just don't know where or how to apply shipping rate table. On the old one it is very easy while this new one lacks options that older one has.
This is a US community discussion forum. You are located in Croatia. What applies in your country may not apply here in the US or other countries. I am not familiar UI. My suggestion is to contact customer service and see what they can advise.