5 years, 8 months ago DT Team !!!
Sorry for the trouble, you can only overwrite the WordPress default template files like (header files), so you can’t overwrite our framework files via the child theme.
So, you can customize the widget title tag under the parent theme. Before updating the theme you should take a backup of your customized files, after updating you can replace the new file with existing file.
If you are happy with our support, kindly rate us. Have a look at the video for the rating process. http://recordit.co/YqdTBuEJRm
Hoping for a 5 star rating from your end 🙂