It's been awhile, but I believe the xup file is for the newest V4.1 ESCs only. Check your speedos for the version, probably V3 or V4, and download the Radon Link version that applies. Do you have the USB program cable as well?

I upgraded from Radon Link V4 to V5, and got hung up on that xup file as well. No promises, but I have some contacts at TP USA, and might be able to get help - let me know which versions you have.