LaMilanesina review for Shopify Search & Discovery

Hi, I am having trouble with this new app because it without asking for the permissions, substitute the previous I have chosen to manage the filters that are no more active on my Shopify store. Now I could also try to use this new free app, but I wouyld like to have access to the filter management control panel as in the previous app. Could you please send me some instruction to do it and reactivate the filters or ctreate new one? Lastly, can this app work with Shopify prestige theme? Thank you in advance