[GNC] Finance::Quote started multiplying prices by 100

[aeg]

I'm currently using GnuCash version 5.4 on a Windows 11 desktopBuild ID: 5.4+(2023-09-23)
Finance::Quote: 1.62
For about 5 years, I've routinely imported prices for my very modest stock holding at the end of every week, but when I did so last weekend, all prices were 100 times bigger than they had been on previous weeks. Whilst I'd like to think I've suddenly become wealthy, I suspect there is an alternative explanation, so is there a straightforward way of resolving this? I couldn't find any settings to change.
Regards,
AlanG