This was a bug since 4.5.1, for new installs only. The symlink that points to the “current” version of our javascript libraries was only updated for upgrades, we had left it at the older version in the installer.
This should be fixed. We released build 339 last night; the upgrade script should take care of this for you. If your system hasn’t upgraded yet, you can just run “yum upgrade interworx*” from the command line.
If you’re already at build 339 (you can see this in NodeWorx -> Settings) and you still have the problem, please log a support ticket.