Products Suddenly not displaying

-- url of the page with the problem -- : www.3dvision.com/shop.html
-- HikaShop version -- : 2.6.2
-- Joomla version -- : 3.5.1

One of my team went in to make an adjustment to change the pricing to a category listing page and changed the "which price" option under the product options tab. Upon saving the menu item, Poof, all products were no longer showing. I can see categories, but not products.

No matter which navigation item I link to it only shows a blank page with no products listed. This is on a production server, so any immediate assistance you can lend would be greatly appreciated!

It's problem with Hikashop view overrides as they are from older Hikashop version.
Try to rename file
templates/3dvision/html/com_hikashop/category/listing.php
via FTP or update it with code from your current Hikashop version.

Thanks for the heads-up... what's strange is that one setting in the menu option was changed.
We restored the Joomla menu table from a backup and everything was fixed.