This is an installation package for the core Alta software that can be used to update an existing Alta virtual machine.
Please also install the alta_rest_server package for version 2.41.0 or up. This update is found in the Alta Transport Stream section of the EEG Support download folders.
Download the .deb file to your VM from a web browser (you can use the desktop or any other folder), or bring it over by USB or another file transfer mechanism after downloading to another computer. Make sure the extension remains ".deb", if it is different this may be an indication your computer has tried to unpack it automatically on downloading, which could render it unusable.
Right-click on the file in the VM environment and select the "Install" option to upgrade (or, from a command shell, use `sudo dpkg -i <filename>`