Seems I have to catch up then. I only recently (6 months ago) upgraded my WinXP machine of 10 years to a Win10 x64 machine. In those WinXP years TFDUP served me wonderfully, I think it's time to keep up to date.
As for Tiberian Sun, if you install TSPatch on top of TFDUP, the Firestorm missions break but the menu glitch is fixed. Having only TFDUP doesn't fix the menu glitch. Thing is, TFDUP installs itself to all games (through the .bat it runs automatically) and you aren't able to pick specific games to patch.