The current version has a nasty bug in the installation:
If you choose the custom install instead of Express installation, then a directory C is a: \ Program Files (x86) recreated. This directory is already available as a link, as in reality the directory C: \ Program Files (x86) and is the German translation than C: (x86) is vorgekaukelt the user \ Program. Whether after that another application can be installed cleanly, is open.
If only one bow, but it shows that something has been programmed and has never been tested. That's a pretty unprofessional operation and raises fears that this way of working is otherwise applied to the day. The error is still not resolved.
So my tip: Do not use the custom installation, but only the Express installation. The duplicate directory C: \ Program Files you just can not get away so without the tax tips still work (see Support forum of the manufacturer). In this case, uninstall the tax tips and reinstall the Express installation.