Your welcome to manually download the latest update 10.3.1524 on your 2nd pc via the release history page. That is the latest interim version.
Note: Before updating, make a manual backup via “Menu / Backup” incase you need to restore for any reason. Also close eM Client before updating.
See @Michal_Burger post in the following thread as to why the latest interim release versions are not automatically pushed to all users.