I have been using the wizard and I rathr use FTP.
I got a message today that said "If you want to edit your pages from here, you'll need to stop using the Wizard to publish, as this would overwrite the File Manager changes".
Your site isn't even a Wizard site at the link you gave
So why are you even looking at the Wizard editor
the wizard editor has it's own templates to use and more
If you are using some program away from the wizard then USE IT AND STAY AWAY from the wizard as you posted if you go to the wizard and hit publish there it will wipe out changes you made in the file manager area
But as said your site isn't even a Wizard editor creation so WHY EVEN GO NEAR IT