Phil, a major (cumulative) release is released, for example, 19.06. Then changes are made to the program, and minor releases are issued, such as 19.0605, 19.0610, and so on. Previous versions, including version 19.06, do not contain the changes that were included in version 19.0610. The release date for the cumulative version contained an error; I’ve corrected it, thank you!
It is always recommended to install the latest test version, such as 19.0612.