Thanks for your help Will. i have since loaded 188.8.131.52 after rebooting, which I have never had to do before for an update. Previouslywhen I tried to install the process was started but stopped about 25% thru and said "failed to install" no reason given. Seems OK now.
Downloade updated version 1.7.0 and it failed to install. Downloaded again, same result. New install also failed. Old version no longer accessible.