Hi JohnC,
I've not familiar with SiteSpinner, but I was able to find some information to help.
Here is SiteSpinner's official documentation on publishing your site with their software:
Publishing to your web server
They mention that you will need to your Hostname, login name, and password. Your host name will be your domain name that you are trying to publish to, and your login name and password will be your cPanel username and password.
Besides those details, you'll need to be sure you publish to your public_html folder. I can see you uploaded a file with a .ims extension, however web servers do not understand this file. Instead, if you follow the directions (I linked to above), you can upload the necessary .html files (that web servers do understand) for your website to come online.
I hope this helps point you in the right direction! If you have any follow up questions, feel free to post a comment at the bottom of this page.
Thanks!
- Brad