How do I revert to the old version of Zoho Invoice

How do I revert to the old version of Zoho Invoice

Hi,
When I last logged into Zoho Invoice, I was presented with an option to move to a new version. However no-where did it tell me that I would now be sending adverts for Zoho every time I sent an Invoice.

How do I revert to the old version where my Invoice design was presented to my customers as I designed it, not as re-designed by Zoho?