Saying 'welcome' somehow doesn't seem right under the circumstances - it will take a while for your brain to catch up with the change to your role.
I believe that there is no such thing as a 'former' carer - even when our caring duties end we are still people who 'care', but now in a wider sense which is why I always hope that 'former' carers will stay with the forum - their knowledge, wisdom, advice and experience are invaluable to new members.