Hi DML,

possibly the install URL is not correctly formed. I will make a note to myself to check the instructions on that.

Here is how it works:

Let's say your shop is called bookxshop.com and you have renamed your "admin" folder to something else like you should for security reasons, let's say "mysecureadmin" so that you log into admin with the following URL: http://bookxshop.com/mysecureadmin

After you log in, then you should get to http://bookxshop.com/mysecureadmin/index.php
Now you add the bit "?action=bookx_install" so that the entire URL reads http://bookxshop.com/mysecureadmin/i...=bookx_install

Here are a couple of other scenarios:
You have not renamed your "admin" folder, so the URL would be http://bookxshop.com/admin/index.php...=bookx_install
You are developing on your local machine and the URL to your admin page is different, so it could be http://localhost/bookxshop/mysecurea...=bookx_install

even if you don't see the index.php part it should work if you put http://bookxshop.com/mysecureadmin/?...=bookx_install

Hope that works.
p.