If you are not using customized templates, just remove the discordtemplates folder and start up the server
If you are using Customized templates:
Backup your discordtemplates folder. Delete the discordtemplates folder and restart the server.
The discordtemplates folder will get generated with a folder default inside of it.
From here read the customized templates guide again.
It is best to start over again from the newly generated templates. Check your backed up templates and compare them with your new template pack. Unfortunately there is no easy way to migrate them other than to compare and adjust. Sorry about the inconvenience caused.
But this will be the only and last time we will break the S++ API. A clean up was desperately needed. And from this point forward your customized templates will always keep working!