"I have the latest versions of Reaper & BIAB 64B installed as per date 24 Oct 2022"

I had 422 running but tried 426 and it did not work.
Use the 423 or 422 as 426 won't allow you to have the Track menu tweak to use the injector.
Just install the 423 and make a copy of bbw64.exe and rename bbw64 - 423.exe and run that without 426 running to use the track injector. Then you can install the latest version but still have the injector version for Reaper to use.

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