Problem Installing IDE 1.8.9

The first time I tried an upgrade install of Arduino 1.8.9 from 1.8.6 it said the new install was successful. However, on opening it I saw the header read 1.8.6. Everything seemed OK with all my old sketches in place. So I tried the upgrade install a second time. This time once again I saw 1.8.6 at the header, but this time all of my personal files (about 3 dozen are gone!!)

Does anyone have any advice for me, PLEASE!

My advice would be to read the sticky posts at the top of the forum.

OS etc etc.

There are occasions when it is better to do a proper uninstall for an IDE.
Then clean up afterwards (depending on OS etc..