Columns Disappeared

Depending of the view mode the columns count can be different. Right-click in the menu and select View submenu and then select the columns count. Then Right-click in the menu and select View->Default. In the Default view mode the columns count can be less then you've selected. TLB try to fill the full menu height. If you select View->Multicolumn menu, then TLB try to create as much the columns as you selected. The menu height can be less.