File upload

First of all thanks for this great free plugin!

Just a small feature request/suggestion: I believe that multiple files upload is kinda confusing the way it is. You can allow it by changing the shortcode, but the only way for the final user to use it is to multiple select the files in the OS file browser (which can be a hassle if you want to upload files from different folders). Also there is no clue for the user about how many files can they upload. It would be cool if you let users select a file, then select another one, then select another one…

Other than that, excellent plugin ??