@Charlietbh What platform you migrate to will depend on your business needs. I've seen small businesses that just needed a stripped down version of Quickbooks for bookkeeping and invoicing find success with Freshbooks as it is much more reasonably priced.

Sage and Xero are also good alternatives but will be be more pricey.

I've recently been encouraged to look into Odoo and though I haven't personally had a chance to experiment with it, the platform looks promising and has much better communication from its developers who seem interested in giving customers an actual practical experience.