Hard resetted on my Lumia 950 XL with 10.0.15063 build which seems to be RTM for Creators Update and seems... They changed default alarm (maybe not only) sound again! Where can I find older stock ones and does anyone tracking such changes at all? On Lumia 620 there was one version, on Lumia 640 another and on Lumia 950 XL yet another. Can't remember exact build versions as for now.