A description of the changes can be found via the links below.
Beware: The Release Notes are not cumulative. If e.g. you go from 1.0.0 to 1.0.2, it may be wise to read the intermediate release notes as well.
Beware: To update the firmware in your RM-U by the Bootloader you need a Bootloader version of the RM-U CPU. This can be recognized by the label "RM-U BL1.0" on the CPU. If you own an RM-U, but no CPU with Bootloader, contact your VPEB sales partner to obtain an upgrade.