SimpleViewer is a software package to allow users to create customizable image galleries.
It is not a web hosting solution which provides web space for people to host web sites.
A SimpleViewer gallery comprises web pages and a gallery can be viewed by opening the gallery's HTML index page in a browser.
In order for the gallery to be publicly viewable, you need to upload the gallery to a web server. (If the gallery files are only on your computer, only you can access them.)
As I suggested, there are many web hosts available which offer free web space which would be suitable to host a SimpleViewer gallery (or other web pages).
Whichever web host you choose, you would need to upload the gallery files to your web space, either though your web host's control panel or by using a free file transfer program such as FileZilla.
Purchasing SimpleViewer Pro will lift the 50-image limit, remove the SimpleViewer badge/link from the bottom right-hand corner of the gallery and allow you access to the many Pro Options available in order to customize a gallery with greater flexibility than the Standard (free) version.
SimpleViewer Support Team