So long, and thanks for all the fish.
You can try contacting us here and we will help as we can.
Here are some tips. First, you can create a static copy of your full site using a tool like a recursive WGET. You can also pull down the static site files using FTP using the same login you use to edit the site, but note that this method will not include anything you have edited.
We cannot provide any recommendations for alternative web content management systems, but if you do a web search there are many to choose from. However, as always we recommend working with a web professional to manage your online presence.