How to migrate from WP-Invoice to Web Invoice?

Web Invoice and WP-Invoice are two WordPress plugins that allow sending invoices and bills. Web Invoice is a fork of WP-Invoice with lot of new features that most people will want. In the current release (1.6.2) they are:

• Send invoice reminders to customers with a secured link back to the
  web invoice
• Moneybookers, AlertPay or PayPal available if you don’t have a
  credit card processing account
• Setup recurring billing using Authorize.net’s ARB (Automatic Recurring Billing) feature or Moneybookers
• Automatically mark invoices paid via Moneybookers as paid (Requires
  merchant status)
• Automatically mark invoices paid via AlertPay as paid (Requires
  business status)
• Split gateway support (Your client is given the option of choosing the preferred gateway from the list of gateways you support). e.g PayPal and Moneybookers
• All user interfaces are internationalized

If you are already using WP-Invoice and would like to leverage these new features, it’s simple. Follow the 3 step process to switch from WP-Invoice to Web Invoice.

1. Rename the tables invoice_log to web_invoice_log, invoice_main to web_invoice_main, invoice_meta to web_invoice_meta. (Assuming $table_prefix is empty)
2. Download Web Invoice WordPress plugin and upload it to your server
3. Activate Web Invoice

That’s all, you can use Web Invoice without losing that you generated with WP-Invoice.