It took a while, but I've managed to get http://www.happyfolding.com/
up and working again. Let me know if anything's not working or not looking quite right. I'd appreciate it a lot.
The origami dictionary is currently not available. I figured it'd be better to get most of the page up and running and work on the dictionary after that.
If you'd like some background:
From August 22nd to September 27th 2015 happyfolding was in maintenance mode, as I accidentally deleted some files and I only then realized backups hadn't been working since we moved servers. Thankfully there was just one component I had to rewrite from scratch, the theme. This is what determines what the page looks like (vs. the actual content on it).
The second component that I couldn't reproduce is the dictionary module. However, I do have an old version of it, so I "only" need to update it to work with Drupal 7 (the content management system I use).
Regularly check that your backup system is working...
Also: sleep deprivation leads to mistakes you usually wouldn't make.