The files in this folder can be manually copy-pasted as config presets into your resourcepacks folder. Simply pick a preset you like, copy-paste it, then rename to the pack's exact file name, change it to a .rpo file and finally reload in-game which can be done by pressing F3+T.

(Respackopts does not automatically detect these in some versions due to the pack specifying version 9 for backwards compatibility. Using Sinytra Connector to get Respackopts to work on Forge is also not recommended as it is not really supported by the mod. And no, there will not be yet another config option solely for enabling config presets.)

Presets:
Default = Default configuration (delete current generated config to reset)
Legacy = Tweak settings as if it were a true former version of the pack
Enable All
Disable All