No update notification - manual update?


I read that nextcloud 18 is available. i have runnung 17.0.2 or 17.2. homever i got no update notification when i log in as administrator.

i think about a manual update as described here:

So i have to replace everything except /config and /data. but when i do that the directory /apps will be overwritten. that means my installed apps are gone - or am i thinking wrong?