APP_VERSION in CMakeLists.txt needs to be updated with each release as well. This is the version number packed into a 16-bit binary value as follows:

3.1.4

set(APP_VERSION 3092)

3092 = 0000110000010100 = 3.1.4 Major (6 bits) = 000011 = 3 Minor (6 bits) = 000001 = 1 Micro (4 bits) = 0100 = 4

3.1.7

set(APP_VERSION 3095)

3095 = 0000110000010111 = 3.1.7 Major (6 bits) = 000011 = 3 Minor (6 bits) = 000001 = 1 Micro (4 bits) = 0111 = 7

(I'm not in a position to do this as a pull req right now so I opened a quick issue record.)

Oops, thank you ^^