Changing your business and contact details needs to be done in each section of your program.
To change your business name on your cashflow reports:
In Cashflow, go to [Tools] in the top left.
Then click on [Options]
You can then change the business name
To Change the details on your Invoices:
Click on Customers
Go to [Tools] in the top left
Click on [Options]
Then you can change the address details, business details and contact details