FreelanceStation 1.5 is now published to the Mac App Store. This release fixes some serious bugs, improves the UI and makes invoicing more flexible. It also introduces a Payments window to show and also remove recorded payments, and a client accounts inspector panel for the Clients view, which allows you to edit the accounts balances and recompute the amounts.
The Release Notes provide an itemised list of changes and fixes.
You can download a free 30 days trial here or purchase a license in the Mac App Store.