Thumbnail of the cart popup

-- url of the page with the problem -- : rockandrocks.com
-- HikaShop version -- : Business 4.3.0
-- Joomla version -- : 3.9.18.
-- PHP version -- : 7.3
-- Browser(s) name and version -- : Google Chrome v. 81.0.4044.138 (Build oficial) (64 bits)

Hi.
In the .php I resized the thumbnails in the popup that appears when adding to the cart. The problem is that it keeps picking up the thumbnails from the 50x50 folder. So they are very blurry.
If I change the folder in the Chrome DevTools to / images / com_hikashop / upload / thumbnails / 100x100 /, the images look perfectly.
How can I change the path to extension takes the images from this, or another one, folder?

Thanks in advance.

Hi.
Solved!
Thank you very much Nicolas, for the solution and the quick response.
I had been looking for in the forum for a week, but I didn't find It.
So... Solved!