Did you get my email from support, Rephil? I sent it around midnight US Central time. Basically indicates what Pfeil is outlining here, with some instructions (check spam).
The instructions from the email:
There's a shortcut to Windows' trainer through VA - just go to the Options screen, Recognition tab, then click, 'Utilities'. Then, click on, 'Add/Remove Dictionary Words' and then select, 'Add a new word'. Type in, 'tune' and then click, 'Next'. I would select, 'Record a pronunciation upon Finish' and then follow those steps.