yes m8 its an .xml file
ic_setting.xml
you have to swap the xml file for a png then add the ic_setting.png NOTE SETTING not SETTINGS
as seen in the video below
Method
open the app in MT manager
scroll down and select the orange resources.arsc
now select Arsc Edito plus
select search from the top menu
start new search
in the text to find field enter ic_setting.xml
you will get one hit , click on it
it will take you to this screen :-
View attachment 7896
change the .xml to .png as seen above
now back out saving when promted now goto the res/drawable folder
and upload an image named ic_setting.png make it a square image
depending on what the image is getting resized to in layouts it does not make a lot of difference.
save out and now the app when loading will avoid the ic_setting.xml and instead load the ic_setting.png
this should sort you m8
remember setting not settings