Hey aspirant, If you have applied for April session from the same account which you used for January session of Jee mains paper then there is no need for the image change.

But if you are in some kind of doubt or confusion you can change the image using the application correction link provide in your student ID page by the NTA.

In order to use the link you just have to Log In on the NTA Jee login page.

Hope this helps.

For further doubt regarding this please ask in comments.