Hi Peter, I have registered my company for bulletHQ. It looks like fantastic software, thank you. Is there a way I can change the email I have registered to this account?

Hi, 
Sorry for the late reply. Just follow these steps. 
Follow these steps:
Add the multi user app
Add your new email address
Make new email address admin
Logout 
Login as new email address
Open multi user app
Delete your old email address
Uninstall the multi user app.
Thanks Pete