I still cannot get the pro version that I paid for to work online, just locally.
If you can create and view a gallery locally, then it is this gallery folder that you should upload to your web server.
all I see are the sample images.
This sounds like you have perhaps uploaded the sample 'web' gallery from within the SimpleViewer-Pro download package rather than your own gallery folder.
I tried installing again and the error message I see is "installation failed"
Are you trying to install WP-SimpleViewer (the WordPress plugin) or svBuilder-Pro (the Adobe AIR desktop application)?
How far into the installation process do you get before the error message appears?
What exactly does the error message say? Is it only 'Installation Failed' or is there more text which might help me diagnose the problem? Would you be able to upload a screenshot somewhere so that I can see what you are seeing?
SimpleViewer Support Team.