Hi Alastair,
The installer is still fundamentally the same Wise Installer, although some files have changed. Unfortunately, I don’t have an Intel Mac to test this on; I only have an M1 Mac and use Parallels for Sailwave.
Perhaps you could try the trial version of Crossover to see if that resolves the issue? Alternatively, the Wine version described here Successful install of Sailwave on a Silicon MacBook M1 and a Silicon Macbook M4 with WINE - Mac and Linux - Sailwave User Group might work on an Intel Mac. Despite the title I think there is still a problem with Apple Silicon when using ratings - one design appears to work.
Hopefully, someone else with similar hardware can assist you further.
Regards,
Jon