The button "Save settings" is no longer there. It has been a while now and I've been waiting for a fix for months now, but I guess no one is working on this recommender at Valve anymore.

Bugs:

• "Save settings" button disappeared (tested on Steam client, Chrome, and Firefox)
  
• Refreshing the page resets included/excluded played games to the last settings you saved (if you used the recommender before the button disappeared)
  
• Refreshing the page resets popular/niche slider to the last settings you saved (if you used the recommender before the button disappeared)
  
• Refreshing the page resets older/newer sliders to the last settings you saved (if you used the recommender before the button disappeared)
  
• Refreshing the page resets tag filters to the last settings you saved (if you used the recommender before the button disappeared)
  
• Games played with under one hour of playtime don't appear in the included/excluded games list

Also a feature much needed:

• See the price of every recommended game without having to hover the mouse on it
  
• Alternatively, a slider to filter min-max price

This recommender is pretty much the only feature I use directly on Steam to find new games to play, so Valve, please fix!!!