Sorry for the late reply Bruno - for you (or any passer by readers):
Log into the zoho account, head to the account settings menu (not the mail settings, but the actual account) - at the time of posting - by clicking your account picture at the top right of the zoho site, and click “my account”. From here, you simply click “Two Factor Authentication”, and then click “Manage Application Specific Passwords”, and generate a new one with the title you give it.
And that should do it!