Modifying invoice model list

I’m currently trying to adapt Invoice Ninja to my needs, and it’s going well so far, great app ! I’m self-hosted and plan to be in production, using v.4.3.0.
Here’s my question : where in the code can I rename the custom invoice designs and remove the unwanted ones? I saw the provided ones (*.js) in the “storage” directory, but I can’t find the custom ones.
Thanks for any help.

We don’t support renaming the custom designs or removing the standard designs.

You may be able to remove rows from the invoice_designs table but I’m not sure if it will have unintended consequences, we advise against manually modifying the database.

Thank you for your reply. I’ll make some tries !