Opus has always restarted after installing update now it does not 13.19.5
The install just closes
I noticed the same
It's because the installer now needs a new argument for that to happen (ALLOWRUNINSILENT) but old versions don't know to add it when running an update.
It won't affect any other updates, just the first update to 13.19.5 or later from an older version, where you need to launch Opus manually once after the update.