Lumia owners on Windows 10 Mobile can update the Touch app with a new version. This appears to be a minor update that apparently fixes some sensitivity issues in previous versions.
Officially the new verison number is 220.127.116.11. This update does not add the much requested "double tap to wake" features on the new Lumia smartphones from Microsoft (Lumia 950, Lumia 950 XL), but hopefully that will be included in a new version in the near future.
Thanks to everyone for the tips!