But the Windows version has the same reference to a file <install>/license/license.txt, which doesn't exist.
Nor can I find any mention of a license in the SDK install tree.
The closest thing is a file named 'eula.cyclic', which turns out to be a HTML file, but these licensing terms seem mention only using software on Cypress hardware, which is not applicable for the CyUSBSerial library (I think?).
I tried to re-install the SDK, but it did not prompt me to accept any licensing terms.