Update:
Went through the whole uninstall thing again, this time including a reboot in between. No change.
But - I have just discovered that I can save locally, but only in landscape: in landscape I get a text enter screen with a DONE button when clicking in the name box. In portrait this doesn't happen and I have this 'can't save route' issue.
So an easy workaround (but maybe something that is fixable in an update?).
Ralph