Heartcoding Sales & Discounts

I SET THIS IN FIVE START TO JUST GIVE A WARNING BUT THIS I GIVE ZERO STARS HERE. WARNING!!!!
DONT INSTALL THIS APP FOR THE WELLBEING OF YOUR STORE. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!When I uninstalled and eliminate this app, the sales tags and prices in discount got stick and didn't disappear, the products got variations in the prices, all the system got lost and had to restore the store from scratch. BE CAREFUL. DONT INSTALL THIS APP