Can't setup Product Variation to be filtered on side bar

Hi Guys,

Can't setup Product Variation to be filtered on side bar widget using MarketPress eCommerce. Just like in WooCommerce (free plugin)

Says, I've variations of COLORs and SIZEs to classified my stock.

The users can't filter the COLORs or SIZEs at the front-end which can be easily done using WooCommerce plugin(free plugin).