Custombuild plugin thinks it's custombuild 1.x but it's not

I installed custombuild 2.0 and cutombuild plugin, but the plugin thinks it's custombuild 1.x

Those are the errors

Code:

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Warning: shell_exec(): Cannot execute using backquotes in Safe Mode in /usr/local/directadmin/plugins/custombuild/admin/elements/header.php on line 7

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This plugin is compatible with CustomBuild 2.x only.

Code:

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Warning: Invalid argument supplied for foreach() in /usr/local/directadmin/plugins/custombuild/admin/tools/clearlogs.php on line 11

Warning: shell_exec(): Cannot execute using backquotes in Safe Mode in /usr/local/directadmin/plugins/custombuild/admin/tabs/update_software.php on line 4

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Custombuild plugin thinks it's custombuild 1.x but it's not