Hello Rune,
Thank you for reaching out and providing the detailed description of your issue along with the image.
We regret to inform you that the HTML and plain text content fields were purposely removed from the email editor. This change was implemented to avoid losing other critical functionalities associated with the WoodMart theme.
However, you can still fully translate your emails using .pot files in the Loco Translate plugin. This will allow you to adjust the email content without the need for the previously available fields.
Please let us know if you need further assistance with using Loco Translate or if you have any additional questions.
Brgds
Xtemos Support Team