Hesitated at first. But the extension REALLY surprise me. Simple, yet very well done. A few tips to make it even better will be 1. Be able to assign code to subcategories and 2. Will be a great option after creating the code and attached the file to be able to send an email to the person you what to share the file with. This last will be a definitely PLUS. Other than that users out there. Download the extension and tested your self you will not be disappointed.
I had to take the time and write a few words here. The plugin works has told. No problems, no hassles, no issues... what so ever. Stop thinking about getting it and just do it! You will not be disappointed.
Thank you very much for your recommendation, appreciate it very much!