I've updated my bios on my m15 to the latest version 2.0.4, however, the custom thermal profiles stopped working and the fans are now always on, even tho the system is at around 40 degrees in quiet mode. Unless there is a fix coming, I'd like to go back to the 1.4.1 where the custom profiles worked, as now the laptop is very noisy and not very usable in quiet environments. However, when trying to install the older version, it says that downgrade is not allowed. Is there a workaround how to downgrade the bios or any other way of making custom thermal profiles work again?

Thanks.