FWIW, I see the prompt for every regular minor VirtualBox update, on all of my macOS, Linux and Windows hosts. The procedure is as follows:multiOS wrote:The Extension Pack is installed on the Host machine and there is no prompt from VirtualBox (that I've ever seen) to upgrade.
I download and install the new VirtualBox version itself, using different methods depending on the host OS. After completely finishing the installation, I manually start the VirtualBox Manager, and then it presents a dialog that the installed Extension Pack doesn't match the VirtualBox version, allowing to download and install the matching EP version with an extended series of dialogs. Some people have even complained in the forums that they may suffer from RSI after mouse clicking through far too many confirmation dialogs.