Ready e commerce version 0.3.3.1

since I downloded this update all my oprions have been re set. I can not set the shipping option – tells me I don’t have admin privilege. If I try to do additional product parameter it freezes and it removed all of my previously installed individual product paramaters of screen although they are visible in options.
How can I go back to version 0.3.3.0 ???

http://ww.wp.xz.cn/extend/plugins/ready-ecommerce/