It says the file is Version 0.5.0.0, February 3rd 2015.
The version of Start 10 is 1.0 - is it possible I need to do a full uninstall as 0.5.0.0 sounds old.
Yes that's a very old build.
Did you install standalone or via SDC/ODM and did it ask for a reboot?
I would uninstall, reboot and then clean install a download from the store downloads.