You are correct, the Basic Free version offered here on ww.wp.xz.cn does not have the option to adjust the watermark locations.
We have created an updated version with the Advanced Premium Features you are looking for and many others!
Here is a link: http://mywebsiteadvisor.com/products-page/premium-wordpress-plugins/signature-watermark-ultra/
Thank You!
This feature is clearly stated to be part of the premium version. Please do not rate a plugin based on features you wish it had but clearly states it does not.
