For those still looking to change it manually before it is implemented in UI, you should be able to do it directly via MYSQL.
Keep in mind this may kill your install!!! Make a Full backup, and then another!
- Open up mysql
then run the following:
USE ninjadb; #this should be the name of your invoice ninja database
SELECT number, design_id FROM recurring_invoices; #this will print out a table with the recurring invoice numbers and the design id’s assigned to them, note the design id in the invoices you want to change, and the design id in the invoices that already have the new template.
UPDATE recurring_invoices SET design_id = 12 WHERE design_id = 2; #the ‘12’ here is the new design id we want applied and 2 is the old id we want replaced, Your id’s will be different, you can get them in the previous step
You will then need to edit>save each Recurring Invoice you have the old template on.