I had a lot of issues with the download for com1 - one upload in 10 would actually work. All other tries would crash out at the same initial point. I altered every conceivable setting for ports on my PC and was convinced I was just missing something obvious until I used the com2 executable and all worked fine (obviously I swapped the serial cable across from com1 before anyone points out potential D'oh!:)
All of a sudden I could upload logos and new, fun kernels (mlords v78 is doing fine right now.)