An error occurred while updating Betheme: The package could not be installed. The package contains no files.
This message could mean that your license key is used on more than one domain. Please use the license manager to handle your license keys: http://forum.muffingroup.com/betheme/discussion/36219/cannot-register-deregister-your-license-key-use-this-tool#latest.
If you see (on our license manager) that your license key is registered on a single domain, then please disable all of the plugins and deregister that license key (through the BeTheme -> Dashboard).
After that, get into the license manager once more. If the license key is still claimed - deregister it. If it’s not, register it again on your domain (through the BeTheme -> Dashboard) and try to update your theme/plugins couple of times (usually it pass after 2-3 attempts) - remember, all of the plugins have to be disabled.
Yes I forgot it was still registered to the dev site while creating it. Solved now.