Beaver Builder plugin Pro Version

First it wouldn’t install from the dashboard because it said file was too big. Ok, so I uploaded to my server through FTP in plugins folder. Went to activate it and now I get this error.

Fatal error: Cannot redeclare class FLBuilder in /disk2/vfn/public_html/vfn-wp/wp-content/plugins/bb-plugin/classes/class-fl-builder.php on line 8

Now what? The lite version worked just fine. Any help would be greatly appreciated.