wpDiscuz AND native WP comments showing TOGETHER

Hi guys,

I'm really desperate now.. LOVE wpDiscuz comment's functionality over WP native comments, yet I simply CAN'T get rid of the native comments - they appear both, one below other. 

Tried to solve it for two hours now - helpless.

IF You could help, I would be IMMENSELY grateful. Thanks in advance.

Problem screenshot:

URL:  https://www.supergentis.lt/2018/11/05/lino-matulio-skola

P.S. I use DIY Thesis theme for Wordpress - could be that's an issue, but..