Change view-mode of menu

1) How can I change the view-mode (to the standard without colums) after creating a menu?

Right-click in the menu and select "View" submenu. You can select "Default" and maybe select 1 column. Other way right-click in menu and select "Customize menu".

2) Can I delete the menu with virtual folders or is it possible that I delete the folder (programs..)? But when i have create a menu and this was an fault then I want to delete this menu oder ist the only way out that I hide the item?

I've prepared the FAQ article. I hope this topic will help you.