Countdown timer changes the prices of my products at the end of the count

I recently bought this plugin and at first liked it a lot. However, after inserting some countdown timers in some products, the plugin has been changing the price of my products. Deleting the “Sales Price” and entering a new Regular Price value.

I remember that I didn’t activate the progress bar. I don’t know how to make the plugin NOT CHANGE THE PRICES OF MY PRODUCTS.

How do I use the countdown timer without it changing my price at the end of a campaign?