How do I open an older collection in Darktable?

Question

I see a list of collections in the left sidebar in Darktable, and now I wanna open one of the older ones, but I don't see it in the list. How would I go about opening it?

Am I supposed to just "import from folder"? I didn't try that because I didn't wanna duplicate my collections by accident.

Right now if I right-click on the folder and tell my OS to "Open with... Darktable", it works as expected, but I'm looking for a way to do this from UI.

Answer 1

Yes, Import > Folder is the right way to go, and you will not duplicate your collections by doing this. The information Darktable creates resides in the .xmp files inside the folder and is simply re-read every time the folder is (re)imported.