For what it's worth..the Tuner Cats site has a WinFlash Update listed under the original WinFlash download. Has the same version number but is a separate download.

I have an extra pcm with DIP sockets so if it bricks, just reflash the chips and try again. That's how I determined my ALDL cable was bad, used another cable and Win 10 flashed nicely.

FYI: Just did a flawless flash with WinFlash via Win 10

My laptop already had WinFlash on it when I did one of those free Win 10 upgrades..no problem at all during the flash.

Any updates related to using WinFlash via Win 10?