For some reason the Fedora 27 ownCloud client is nagging me for more than 3 weeks about the fact that my version is not yet up2date. This is utterly useless on a package managed Linux system. Since they also do not provide Fedora 27 packages on their website there is no simple way of getting the latest version.
Lucky there is a way to turn it of the notifications
ownCloud documentation nicely describes how-to disable the update notification.
After 4 years I have decided to recreate my digital dumping place for various bits and pieces.