Update README.md

Author: jakob-beetz

README.md

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 This repository contains tutorial to learn scripting your own applications for processing Industry Foundation Classes (IFC) files. It is based on a scriptable viewer tool that uses the [IfcOpenShell](http://ifcopenshell.org) toolkit. The scriptable viewer tool has been created for teaching purposes and is used at the [Eindhoven University at Technology](https://www.isbe.tue.nl) and the [RWTH Aachen University](http://caad.arch.rwth-aachen.de) .  
 
-A packaged __binary version of the tool__ is available at [this location]( http://caad.arch.rwth-aachen.de/download/rwth-viewer.zip )(175 MB!) to get you started. It comes with "all batteries included", including python, IfcOpenShell and the Python OpenCascade wrappers.
+A packaged __binary version of the tool__ is available at [this location]( http://caad.arch.rwth-aachen.de/download/rwth_viewer.zip )(175 MB!) to get you started. It comes with "all batteries included", including python, IfcOpenShell and the Python OpenCascade wrappers.
 
 Follow these simple steps to 'install' the viewer/scripting application: