We are so sorry that we do not maintain cInvoice any more... If you have any issues with your cInvoice, and you need support, please contact us at email@example.com to get the source code cInvoice version 7.3, in your email, please make sure to include your domain name, contact information.
After the cInvoice, the code was refactored into a SaaS model invoicing software. It is running under www.invoicetab.com. If you are interested in partnership or purchasing the source code for invoicetab.com, please contact me at firstname.lastname@example.org.