How to change my email address?

I’ve noticed another post with the same question - and no answer after 2 years.
How do I change the email address I used to register with the HDF group and this forum? I’m leaving my current job and need to change it. It must be possible surely? I can obviously register as a new user but that’s not satisfactory.
I also emailed support last week and have received no reply yet.

This has been resolved.