You can duplicate, rename or move any of your flows by right-clicking on the relevant flow in the list on the left of your canvas:
Duplicating a flow: This creates an exact copy of a flow. You can enter the name you want to save the new flow as (defaults to the name of the flow you are duplicating appended by "_COPY").
Renaming a flow: Enter and save your flow's new name.
Moving a flow: Select the folder where you want to move the selected flow from the drop-down. You can start typing the name of the folder to search and filter the list.