How do I change password from Project --> ASP.NET Configuration

I am trying to reset password for user from menu Project->ASP.NET Configuration, but I don't see the option. I created few users for testing, now I forgot all passwords I set for them. I could not find the way to reset password programatically. I have not setup email server yet. Is there any other way without deleting users and recreating, I can change password?

Thanks. 

 
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