from 6.0.4 to 7.0+ without backups – virtual disk formats and saved states may be incompatible.
to ensure your BIOS settings (like VT-x or AMD-V) are enabled. System Requirements Operating System Virtualbox 6.0.4 Download
Improved scheduling and power consumption on certain guest operating systems. from 6
Packages for Ubuntu, Debian, Fedora, and openSUSE are available in the Index Directory. Virtualbox 6.0.4 Download
Oracle VM VirtualBox is a free and open-source hosted hypervisor for x86 virtualization. It allows users to run multiple operating systems simultaneously on a single physical machine. While the current branch has moved far beyond version 6.0, version 6.0.4 holds a specific place in the software's history.