My downloaded software doesn't ask me if I'm a new member or not and installs mre as a new member
From memory, the iStripper installer gives you two options when it is started
1) Create a new user account
2) Use an existing account
The first is is big friendly letters in a big button
The second is just below the first, but is written in small letters
Many people have not noticed the second option and blindly clicked on what they thought was the only button. I did it myself when I first installed on a second machine. However, using the procedure that
@gkar45 has described you can easily recover.
I really think the options should be more equally presented.