New version 3.0.0 filter function is broken

I purchased premium version for my production website yesterday and installed it on http://www.bobydo.com/products/. After that, “Categories” filter function doesn’t work anymore. My test website works fine still. test.bobydo.com

I hope I can rollback it to version 2.6.1. Anyone knows how to do it?

Thanks,

Shenyi

https://wordpress.org/plugins/ultimate-product-catalogue/