I still have not been able to get this plugin to work in 1.5.5f. Yes i did get it to work in previous versions. I just cannot get the restrictions to work. Here is what I have set up. However none of the categories are restricted.

Set Categories Requiring Customer To Login 3,4,5,6,7,8,9,13
Customer Shop Status - View Shop and Prices 0
Customer Approval Status - Authorization Pending 0