I don't know either, I'm interested, if you found the answer let me know!

Hey, I think I found it !

I think you can change your profile picture in the settings of your razer ID.

Let me know if it worked!

Hey !

That's right!

When you have changed the profile picture of your razer ID, you log out and reconnect to razer insider and your new profile picture will appear.

I hope I helped you, have a good day ! 

Thank you so much dude!

Have a great day man

Have a good day !