When trying to switching to CorelDRAW Graphics, it says, "CorelDRAW(R) X8 is not installed..."
One scenario for this kind of issue is that you may have CorelDRAW X8 installed before purchasing e4 software. If that is the case, you may have a old version of CorelDRAW X8 installed, for instance, Version 126.96.36.1991, as indicated in the screenshot below:
You must uninstall this version and reinstall CorelDRAW X8 from e4 USB stick. The correct version is 188.8.131.520, as indicated in the screenshot below: