I do not recall such a method. As far as I know, it's always looked like the current method (and been the one I've used for years), with the exception noted in the screenshot:

You then chose which folder (on your computer) to use, which would include its sub-folders. I'm not sure when the new option, to choose selected folders, appeared, but if that option is chosen and there are sub-folders in it, it opens a folder selection panel as shown below:

Note the sentence I've underlined about importing from the camera roll. one of the options it's referring to is using Windows File Manager, as I mentioned previously.
Your only other hope is if you ever had a back up of your computer, or even just of the pictures. This could be on an external hard drive, memory stick, or even an online back up.