For make settings in Scarcity Maker Plugin goto admin left side menu select Scracity Maker -> settings.
On that page you can set White Listed IPs and Scarcity License key.
White Listed IPs : Here you can enter multiple ip address using Pipe separate. Which IP address are enter here they can't redirect on URL after expire counter. It means after expire counter page will not redirect on particular URL.
Scarcity License Key : Here you can enter your License key. Valid License key is useful for plugin's updation.