To edit/modify the existing custom widget follow the steps below:
To modify or to reconfigure the custom widget, you should unpack the custom widget which is in the *.bicw format.
Rename the extension of the provided ‘.bicw’ into ‘.zip’ extension as shown in the image below:
Now right click on the renamed widget as in the image. Click ‘Extract All’ to view the source file.
You can find the unpacked Sunburst chart custom widget and it’s source file as in the image below:
In the unpacked custom widget make necessary changes and convert the custom widget to *.bicw file by the following the steps mentioned in the link here.
You can click on the edit icon as shown in the image below to add the updated custom widget.
NOTE: The edited custom widget guid ID and the updated custom widget guid ID should be the same.