Hi hope someone can help,

I updated to Joomla 3.4.3 from Joomla 3.1 (first upgraded to 3.2.x and then to 3.4.x) and now i can't select Save options on some components, plugins and modules.

I am having issues with the following components:
User Manager : User group manager, viewing access levels
VirtueMart Shop Configuration
Template Manager : Can't click on 'default' link in the list of templates to select default

Other issues:
My template (Isis and Hathor) lost the view website link at the top left corner, some icons are missing

Menus : Joomla Admin picks up that there are items published under my menus but when I open a specific menu to view the items, there is nothing.

Any help would be appreciated, i need to finish up the website in 2 weeks and I can't as i can't save the user viewing groups...

PLEASE HELP - VERY DESPERATE