Re: Simple SEO URL [support thread]
It looks like your folder did not allow the manager to write a file, open /admin/includes/module_installation and do this:
add a file named: .keep
Now, as for it pointing to your old store, SSU does not cache the store url, my wild guess: something is wrong with your zencart configure file, recheck it in includes/configure.php
PS: and make sure you use the latest version which I attached in the previous post.
I no longer provide installation support on forum for all my modules. However, if there are real bugs with the modules please feel free to contact me