My adwords account is in Ireland, so should be in Euro but is set at US Dollars.
As per pervious queries, would I have to create a new account now? Or is there something I can do within my account to change it.
Currency is something which can be selected once in an account and cannot be changed later on as per my experience.
Onething you can do is either first cancel your AdWords account and once you get the confirmation that the account is cancelled, then you can set up a new account taking care of the Currency and Time Zone. This is important to adhere to the AdWords policies.
If you would like, you can also reach out to AdWords support for more details: https://support.google.com/adwords/answer/8206?hl=en&hlrm=en
Once you create the account you can' t change the currency. So yes you may have to create a new account with new email address in order to do this task.
Please read here more - https://support.google.com/adwords/answer/1704334?hl=en