Version 8 is a major release thus upgrading from previous versions (i.e. v7 and older) is not free. However, you are entitled to use your registered version indefinitely, so below is where you can find the installation and help files for older versions of Backup4all.
Note: Versions 1.x, 2.x, 3.x, 4.x and 5.x of Backup4all are no longer supported. To benefit from support and the added functionality we highly recommend upgrading to the latest version. You can download these here: Unsupported versions