Macbook Pro Problem after updating to Safari 11.03
I have a Macbook Pro - 4 years old now. OS v10.11.6. All working ok yesterday. Timeline does regular back ups to an external drive. Last night I updated to Safari 11.03 via the App Store (and left it running). This morning - problems. When I log in, the system tells me that there was a problem in shutdown. Once logged in, I get an image of the App Store screen, but I have no cursor control and cannot input anything. After a minute or so the system automatically shuts down. Tried multiple times - always the same. I have logged on in safe mode - my email works ok like this and I can also do google searches, so Safari seems to be working. The App Store log says that I have updated to Safari 11.03 and this is also confirmed in the "About Safari" summary available under the "Safari" tab in the menu. I can only access the Timeline app in safe mode, or to be more precise I can access the first screen but I cannot restore as none of my back ups seem available in this mode. I tried using the administrator account (in safe mode) but I have no more back up facilities there than in my normal account.
My instinct is that the Safari update did not properly complete and so I need to uninstall/reinstall Safari 11.03 but I have no idea how to do this. I have searched for Safari updates on the App store and in iTunes. The update is not available under "updates in my App store as my Macbook obviously thinks it is already done. I am not technically minded. Has anyone else had this problem or know how to fix? Not sure if I should phone Apple Support or locate an Apple genius. Any advice appreciated. Thanks
JKDr
MacBook Pro, OS X El Capitan (10.11.6)