Clickable Bliss this week released ProfitTrain 2.0, an invoicing app for Mac OS X. The application was formerly called Billable. ProfitTrain is an invoicing application that would be perfect for freelancers to keep track of what work they’re doing for different clients. The app will allow you to keep track of expenses and invoice payments, as well as creating the invoices to send to clients.

According to the company, ProfitTrain 2.0 added a number of new or improved features including multiple business support; the ability to toggle the active business from the toolbar; better syncing with Address Book; line Item Blueprints to help you create invoices of common services; new ‘Estimate’ status for invoices; the ability to translate invoice labels without editing the HTML template; first class transaction history to record invoice payments.; and built-in reports and improved CSV exports.

ProfitTrain costs $49.95. Owners of Billable can upgrade for $24.95.