I would suggest you to double check the Update Manager
and update all packages needed. Since RC3, the corresponding folder is located under:C:\Users\<your username>\AppData\Local\Itoo Software\RailClone Pro
One of the main reasons were the growing size of the installer and the necessity with any new release re-download all libraries & maps, though some didn't change since the last published version. Also, this way it allows to update / add new libraries at any time without need to release a new version of the plug-in itself.
Hope that helps.