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I have the exact same problem :/
Can't install any device after installation of Quartus. I guess I'll have to reinstall. Devs doesn't read these forums? It's like three weeks since first report..
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I think you need to try the workaround mentioned in this post. It works on my side.
Just Use the QuartusSetupWeb-15.0.0.145-windows.exe to install your device, then put QuartusSetupWeb-15.0.0.145-windows.exe and max-15.0.0.145.qdz (or other qdz files) in the same directory. Next, launch QuartusSetupWeb-15.0.0.145-windows.exe, install to the same directory that you had Quartus II installed.
You can also uninstall your previous installation, then install Quartus and devices all together at the same time.
You can submit a report to altera, they might provide you a patch for this before they released it officially.
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