Ok, I dug up the v7 repo, then from the shell;
cd to /etc/yum.repos.d
then I went back to the gui software center where the update to 7.0.5 was available but using that failed because I didn’t install the key, back to shell;
run yum update, that installs the key and then, still in shell, type y to allow update to 7.0.5.
Return to gui software center, no update available, good as expected, switch over to owncloud gui, which I already had open and was logged into;
hit f5, the page refresh starts the update, updates runs fine and owncloud seems to work fine, now on 7.0.5.
Also tested with ios app, works fine.