Thanks for the solution about product groups filter in Rapido latest. Now I've found a bug.
On this site, http://dynamicwebdemo.dwsales.dynamicweb-cms.com/english/products/accessories/eyewear I activated the group filter, and when I use the menu to the eyewear product group it is activated as a filter. However, it is not possible to close the filter by using the corresponding "x"