The procedure for requesting AWR support has changed. Please read all about
the new AWR product support process.
Select item in the project tree, hold down the Shift while typing the Delete key to delete without a dialog box to confirm.
If you don't use the Shift key, you will be prompted to confirm you want to delete an item.
This is to prevent accidental deletion when using the speed (right-click) menu and the delete command is near other commands that are useful or accidentally hitting the Delete key.
Sometimes you know you want to delete a bunch of windows quickly and the confirmation dialog makes this difficult. The Shift key is the answer.
Please save your project before you mass delete objects as there is no undo of a deleted document.