I would suggest you to double check the Update Manager
and update all packages needed. We've just reset your login credentials. Please try it again. 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 and please let us know that's all working fine or you are still facing troubles with it. Thanks in advance.