Be aware that using an embedded install, many files are stored in ram, and changes to them will not be persistent on reboot.
Be aware that editing the wrong files can damage your installation and render it unstable or unable to operate correctly, and in some cases can make the system non-bootable.
This tool lets you manually edit files.
This page allows you to log into QuiXplorer to browse and manage your files.
This page lets you do several things, including: