With FollowPlanner, you have full control over your accounts' settings and profile.
To update your settings like timezone, account password or proxy, from the Accounts page open the account that you want to change. Select the settings tab and change the options you want. After you are done hit "Update settings".
Important: the password should only be updated if it was changed outside of FollowPlanner.
The public profile of the Instagram account can be updated in similar fashion, just change to the "Profile" tab and update the values you want.
If you are having trouble updating your profile or profile picture, make sure the link or bio doesn't contain anything that could trigger Instagram's spam filter. If everything seems right but you're still not able to update the profile, you may need to change your proxy to a high quality one.