I want to know what to do with my website done through MAGIX ONLINE WORLD to have it visible on tablets, smartphone, I mean elsewhere then on the comnputers.
The best way is to own your website and remake using the WebDesigner 11 or 12 you can make it responsive that means you can see it from computer and tabets and phone. In reality you make two site one fit for computer and the other fit for portable.
In addition to YR reply - you should use the latest version of Web Designer and the hosting supplied with it or another hosting provider, if you have a domain name you will also have to redirect this to the new location.
Magix Online World is Flash based and many tablets and mobile devices do not support Flash.