When we do an update you should get a notification, but we haven't done one in a few weeks now. Do you have version 6.2.1 of the TBO Updater installed?
I had to reinstall the app recently, and now not getting notifications. I am using 6.2.1. I used to get notifications every time. Now I don't, like when textra update was posted the other night. Is there some setting that I need to check?