The new minor release of GD Knowledge Base Pro is the version 2.4.1, and it is released to fix a number of bugs reported in the past few weeks related to the handling of the articles attachment files.
On the admin side, article edit page and the meta box for handling attached files was not handling the removal of attached files. The plugin was not checking for the validity of attached files, so it was triggering errors, and the attached files were displayed even if the access to articles was not allowed. All these things are fixed in the new version. And, shared code library is also updated to the latest version.
If you notice any issue or problems with this plugin, use the forums to report them.