Note: This is more of a tech support issue and likely not an issue with the actual mod.

I've been using this mod for a long time, and after realizing that I had a typo in the IP of one of my Minecraft servers (Wynncraft, if you're wondering), I changed it and went to transfer the chunks. However, I then realized that there was no bobby folder within my minecraft folder.

I don't exactly want to resort to reloading every chunk, so is there any way I can recreate my bobby folder to retrieve the chunks? Help would be greatly appreciated.

The .bobby folder should still be there. Make sure you're looking in the right folder, and if you're using an Operating System where files starting . are hidden by default, make sure hidden files are visible.
Changing the server address merely makes bobby look at a different subfolder. Unless you enabled the delete-after-x-time setting, Bobby will never delete it.

Thanks for the help, I didn't even know hidden folders existed.