Log-in Issue Fix

I need help correcting log-in problems caused by having different passwords on my iPad and desktop after an upgrade. The usual method to change the address on the PLUS desktop isn't working, even with help.

Requirements:
- Expertise in troubleshooting login issues across devices
- Familiarity with the specific app or software in use
- Experience with account management and password synchronization

Ideal Skills and Experience:
- Proven track record in resolving similar technical issues
- Strong problem-solving skills
- Ability to work quickly and efficiently

I need this resolved ASAP.