plugin is not working

Hi!

I use the WooCommerce Multi Currency for more than a year on free! (i discover in the previews black friday) i love it and work perfect.

I upgrade to the premium, and now stop working. The currency is not change by country only show usd by default and keep reloading so people cannot make any order

I dont change any settings… ¿how i fix this so its work like usual?

the site is

https://emborg.com.ar/

thanks