Thanks. I have seen this command already somewhere, but how to make this default behavior?
So, when I click on a folder and the tab already exists, then the existing tab should be used.
Unable to reproduce the 'issue' - when closing tabs (see my first post) at some point I was sure to be closing x:\PDF and then again x:\PDF, hence my assumption that Opus opens a new tab even when selecting the same folder.
However, Opus doesn't do that, it selects an existing tab.
Sorry for jumping to the wrong conclusion and posting too quickly: I should have tested it again before doing so.