Hi DF5
gavin12345 is correct.. MYOB's business plan, as sold to financial advisors a few years ago, is to get all MYOB users into the online monthly subscription option. Once everybody is online paying subscriptions, they can jack the price up whenever they feel like earning even more profit. If you took a backup before upgrading, go to the link that gavin12345 sent (and I sent too) to get your fully owned and paid for version working again. MYOB couldn't give a toss if you are a NFP. Believe me I tried with one of my NFP clients.
regards,
Liz