Tale of two upgrades - Leap 15.5 KDE

I upgraded two systems from 15.4 to 15.5, my main desktop system and my ThinkPad.  My desktop has the new desktop, but the ThinkPad has the same desktop as 15.4.  Any idea how this would happen?  Is it possible to move my desktop computer back to the 15.4 desktop, which I prefer? tnx jk