go to your profile. click on your pictures. then pic which one anda want, atau click on the upload button to upload a new one & then anda can ubah the pic oleh clicking the ubah button. if the pic is there that anda want then click the little person below it to make ur icon pic. hope ya understand that!
Well what I do is go on my profil and click on lebih photos, choose which one I want for my icon and make it my icon oleh clicking on "Make this image my icon." (Says it under all the gambar anda uploaded. Or, I upload the image I do want for my icon into my profil and when I'm editing it, I check off the box that says "Make this image your icon." Hope I helped :)