Fraser, just joined this forum to reach out to you. I too have obtained a HS324, and can't get the resource CD with GUI and Firmware from FLIR tech support. They've told me many different ways that they no longer support this product and do not have any files for it.
That said, any possibly way you can send me the same files on the CD? I tried the old links in this forum but they're expired.
Any information or help is greatly appreciated! Send me your Venmo and I'll drop you some $$ for your troubles.
Thanks,
Troy