How can I undo navigations I made in the header menu on blocksy?

I changed something on blocksy child theme in the header section and now the icons “account” and “basket” disappeared so I can not add them to the menu anymore because they are not displayed anymore.

Can someone tell me how I can go back to an older version of my website or undo the changes I made in the blocky menu in general plus in this case particularly when it comes to adding account and basket in header section? Is there a button or do I need to install another plug for future records?

I hope there is a way to undo the actions made in the menu (and not on the page) and add the two icons back!?

Your help is appreciated!