Hi,
I work for a company (Coolgear) that sells some of these IR adapters, and even some Polar compatible models.
We were taken completely by surprise by all of this. We had tested all of our IR adapters, even the older (and much better SigmaTel models), and they worked just fine with the Windows 10 pre-release editions and thought nothing further of it.
On launch day, none of them worked anymore. Come to find out, some time between the pre-release edition we tested with, and the final release, Microsoft removed *all* IRDA support from Windows. The entire IRDA stack is gone (imagine a computer coming without
TCP/IP support!).
We've been in touch with MosChip/ASIX (the chip used in all of these adapters) and they have assured us that they will be working to provide us (and all of you!) with and updated driver & software, but can provide no ETA. Obviously they have to do a lot
more work than simply fixing a few bugs an resubmitting for WHQL certification, so it may take quite a while.
Stay tuned to our website, we'll have the the driver posted there as soon as it becomes available, and in theory it *should* work with any MCS7780 based IRDA adapters, as we do not make firmware or EPROM changes to our units.
For those with the older (and frankly superior) SigmaTel units, I'm afraid that company has been out of business for a long time, so a driver update for Windows 10 is unlikely :(
www.coolgear.com
Sep 30th Edit:
Allan Cho from ASIX (The chip manufacture) has some info in this thread here:
http://answers.microsoft.com/en-us/insider/forum/insider_apps-insider_other/irda-not-working-build-10166/4318715b-7939-48e5-a339-7665f2bd3fcd