According to the 2nd post in this thread Wavelab 6 should work on Windows 10, so you should be able to get it running using the following procedure.
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Download and install the latest elicenser software on your new Windows 10 computer.
http://www.steinberg.net/en/company/technologies/elicenser.html -
Move your USB elicenser from your old Windows 7 computer to your new Windows 10 computer.
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Download and install the latest Wavelab 6 installer for your version from Steinberg Downloads onto your new Windows 10 comupter. Wavelab 6 (which is the full version), Wavelab Essential 6, and Wavelab Studio 6 installers are available under “Unsupported Products”.
Downloads | Steinberg