The upgrade path from UBB.threads
7.5.x versions, has always been to move to the most recent version of UBB.threads
as they become available. Such as 7.5.x => 7.6.x.
There is no need to do an incremental update from 7.5.8 to 7.5.9 to 18.104.22.168 to 7.6.0. You should update directly from your current UBB.threads 7 version, to the most recent version of UBB.threads.