Not quite. Those instructions were for launching Main Menu from Synapse after
installing Synapse. It sounds like you've already solved your problem, but
I'll explain anyway because I think you'll find it useful next time you can't
find something. Searching Synapse is much easier than digging through menus.
The first command$ sudo apt install synapseinstalls synapse. That will work
for any package if you replace 'synapse' with the name of the package.
The second command$ synapsewould have launched Synapse, which looks like a
search bar that appear in the middle of the screen. This allows you to search
and launch applications and locations in your system.
Typing 'main menu' at that point would have searched for the menu editor in
Synapse, and pressing enter would have launched it. (see attached screenshot)
If you click on the circle in the top right of Synapse and select
'preferences' you can configure Synapse to start on login (in the background)
and decide a shortcut to launch it.
