HelloI installed the openLCA version 1.9.0 software and accidentally hit the cross on the Navigation tab. I tried several solutions to put it back but negative.Thank you for your help.Amy25
Then you have maybe detached it first (right-click on nav tab, detach)? Did you try Tools / show views / other and then select the navigation tab?
Otherwise, you can refresh the entire layout, as described in the answer to this post (2nd option): https://ask.openlca.org/2082/openlca-window-veiw