Marcely's Bedwars comes with quite many configurations out of the box.
It may be difficult to understand how everything is structured and where a config is located at the beginning, but the plugin follows a very simple schematic.
Generally, everything that is being created by the MBedwars plugin is being stored within the /plugins/MBedwars folder. If you want to reset your customizations, it is safe to delete all files apart from the data folder, as that one includes e.g. the created arenas, added dealers, and possibly even the player's statistics, if they are being stored locally.
You may click on the blue tinted buttons to read more about them.
config.ymlteams.ymlspawners.ymlshop.ymlupgrades-shop.ymlshop-layouts-properties.ymlsounds.ymllobby-hotbar.ymlspectator-hotbar.ymlachievements.ymlhologram-lines.ymllanguages folderscoreboard-layouts folderarenasgui-layouts folder