Help with text widget

Hello,

Firstly thank you in advance if anyone can solve my probem.

So the problem is the following:

This theme has nice text widgets but for some of boxes I want to use the plugin named “colorful text widget”. I’ve installed the plugin and activated it, my problem is the following:

http://omkt.bme.hu/nexus/ As you can see there is a merge between the 2 types of text widgets now, firstly the colorful part is the colored widget and the box in the colored box is the traditional text widget coming with the theme (even tho I used the “colorful text widget” text box found on the widgets site in the admin panel. How could I change to code so that “colorful text widget” overrides the traditional widget when used?