The UltraEdit tag is missing.

If this item is not in the list, the method below can be restored

[Advanced/Configurable]->[Toolbar/menu]->[Custom/Custom menu]-> custom menu,

Expand the view item on the left [menu], where you can create a submenu from [New Menu/submenu], and then locate the Open File Tag command in the command on the right, and drag it to the submenu you just created.

There's a stupid way to do this: You can also resolve the problem by removing the configuration file:

Remove the C:documents and Settingsall users (possibly other account paths) Applicationdataidmcompultraeditultraedit.ini files and restart the UE.