So how do you find the userdata folder in Kodi?

Here you go!

Android

Android/data/org.xbmc.kodi/files/.kodi/userdata/

iOS

/private/var/mobile/Library/Preferences/Kodi/userdata/

Linux

~/.kodi/userdata/

Mac

/Users//Library/Application Support/Kodi/userdata/

OpenELEC

/storage/.kodi/userdata/

Windows

Start – type %APPDATA%\kodi\userdata – press <Enter>