All profile related data, as well as the image, can only be changed in the Instagram application. Postgrain makes no changes to your Instagram profile. Through Postgrain it's not possible to do any change related to your profile.
But, if the changes were related to your Postgrain's account, it's possible. To know how to change email or password, it's just read this article: Email and Password: How to change?
How do I change the display name in the top corner?
Follow the steps:
1 - Click on Settings (in the top corner of the screen);
2 - Click on Organization Data > Edit Data > Remove Imagem > Select the new imagem > Update data
Note: don't forget to click on Update Data, ok?
Have more questions? Visit our Help Center!😊