Shouldn't the feature editor window be under the 'Windows' drop-down at the top? Where is the Feature Editor Template Window?
First enable the editing toolbar --> Customize --> Toolbars --> Editor or right click any grey area and add the editor there. The feature template menu can be found by entering an edit session clicking on "Create Features" (the far right menu) and then clicking the right most menu under the create features panel (see attached screenshot)
Here is some additional documentation about feature templates