Dorico Pro 6 (WIN) does not recognise its own font folder (regression from Dorico Pro 5?)

[benwiggy]

There does seem to be a problem where, under certain circumstances, SourceSans goes missing on Windows.

The Missing Fonts dialogue after Dorico update

Source Sans Pro is included with Dorico, because it’s used as the main user interface on macOS, and is used in a number of places on Windows as well (though the default UI font on Windows is Segoe UI, because that looks better on crummy low pixel density displays than Source Sans Pro). I’ve chatted with a colleague and we’re not quite sure why these fonts would be missing on your system, but what we recommend is that you download the fonts using the link below: SourceSansPro.zip (1.0 MB) Unzi…

@MSTS_Music

So I have booted maybe 7000 times.

If the first 2 reboots don’t fix it, then the other 6,998 probably won’t, either.