Now that Teamviewer 5 is available to download then it is very easy to install this version. However, the commercial license for Hawkstone Design is version 4 and there are no material benefits from using version 5. Teamviewer do not allow Version 4 and Version 5 to mix. The link below will start TeamViewer 4 with the Hawkstone Design commercial license on your PC.
http://www2.hawkstonedesign.co.uk/downloads/TeamviewerQS.exe
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