Important!
If you are still using the v3 module, then do not modify, change or remove anything related to the current v3 module and do not remove the Resellerclub Mods Console v3 Addon.
Just install the new v4 Core Addon as described at RCM Core Console v4 and then use the AutoInstall and AutoMigrate Wizards for this module described at Reseller Bulk Hosting v4