I'm one of those who
have updated to Windows 7 64-bit and I found that the Comms software would
no longer work due to the USB drivers being only designed for 32-bit
systems.The good news is that you can now download drivers for 64-bit
systems from HPs site
here. Just click on the small blue square next to "Operating System
(1)" and you'll find a link to allow you to download the file
"HPCalculatorUSBSetup.exe". I get the impression that this contains
drivers for all operating systems but whatever the case, it certainly
worked perfectly with my Win7 64-bit system.

Unfortunately, as I have reported many, many times
before, there's still no news on an upgrade to the old ADK39 programming
tool. It will not even install under Windows 7 64-bit. I've been recently
informed that HP are going to try recompiling the old ADK39 using a new
compiler. If this works then it should be compatible with 64-bit systems.
Of course it'll still be the old clunky software but...
we can't have everything.
In case you're wondering about the project I mentioned
some years ago to produce a
combined Connectivity/Note Editor/Programming Tool? It stalled and was
never released.