As of Ferbuary 2019 we have discontinued integrated support for the following platforms:
Magento 1.x / 2.x
The reason is low or non-existent interest. Simply put, the number of people using these platforms was too low to warrant a financially viable continued support for them.
You can still use Akeeba Solo with the ANGIE for Miscellaneous PHP Applications installer. When restoring to the same server and location there is nothing more you need to do. If you are restoring on a new server, domain or subdirectory - or if your database connection details have changed - you may need to reconfigure your site manually.
Regarding PrestaShop, the reason is a bit more complicated and has to do with the massive changed in PrestaShop 1.7.5. At this point we recommend against using Akeeba Solo to transfer your PrestaShop installation. There are no instructions to do so manually available from PrestaShop. As a result, we cannot help you make your shop work after transferring it to a new server.