The new versions that are under the “Plugins menu” don’t create a sub-folder for saving. This is due to limitations in the new Photoshop plugins API set by Adobe. Adobe introduced new folder security. For the new plugins API (which is anything plugin that runs under the plugins menu), Photoshop will only allow the plugin to save files into the exact folder path that the user selects. This is an “opt-in” by the user when you click on the save folder and then select the folder. I brought this up to Adobe. They told me they make a change in a future Photoshop release. If/when Adobe makes the change I could possibly change how the plugins work. however, as of now, it is what it is.