I know, do you want pay version... Now... is impossible for me.
To create subfolders you can create a new folder with the separation line, for example: "cars/bad" without quotes.
You can create your custom and temporal folders into the principal screen, if you clear the box, the temporary folder is deactivate.
You can create your custom watermark. The beta version is on development, but old version is outdated, I recommend you that use the beta version.