Hey, I know this is a months late reply, but I'm docking it here in case there is a soul out there that's still seeking an answer for this situation. Here are steps I would suggest doing:
- Upload all your image assets to Imgur or other image hosting websites.
- Open the hotglue page you want to backup (you will have to do it page by page) and press Control+U (if on Firefox), or otherwise right click and choose "view page source". Save this page on your computer as html, or copy & paste the entire code from this page into a writing app of choice, like Notepad.
This basically primes you for switching your website to a different host, since you have your code basically entirely right there. I would suggest neocities if you're looking for a free website host that is active and won't disappear anytime soon, however you will have to change all of the media links in your html code to the new Imgur/image host uploads. Basically, if you uploaded images directly to hotglue, you will have to reupload them somewhere else and then swap the old link with the reupload's in the html code page.
But if you'd just like to save your source code and nothing else, step 2 is all you need.