I just upgraded from 16.04 to 18.04 via the Software Updater. It looks like everything is working OK. Except that Welcome and Software Boutique are no longer in the main menu (Brisk Menu, Netbook user interface).
According to App Grid, Welcome is installed. However I see nothing in the /snap folder, no snap folder in my home folder.
Should I try to re-install Welcome? Do I need to install snap first?
The snap packages above are installed when performing a clean install of Ubuntu MATE 18.04, but are not automatically installed when upgrading from an earlier release.