The guide hasn't been working for at least several months if not longer, I noticed it missing back in June and mentioned it in another thread. An official explanation has been given by Nz17. I'm still surprised that there were no backups made for the guide besides 6+ year old ones.
Of course, that still doesn't fully make sense as the guide info is still available online, it's really the search feature on the main landing page that's inaccessible. It took awhile for me to figure this out. As as example, I can still search for specific systems as long as I have the direct link to that search, like the Commodore 64 with each game entry still accessible.
http://www.digitpress.com/video-game...tNo=&Released=
I wish I had direct links to each system but I don't. Others can be found with some experimentation. I found the ColecoVision guide as well.
http://www.digitpress.com/video-game...tNo=&Released=
It still would be nice for the landing page to be fixed so the guide can be searchable again. Or just revert back to using PDFs for the guide, with rarity and pricing included.