Select File names for L1 and L2 or others if you have renamed them.

Add

OK

Select Target Directory

Target directory

Done

File menue    

Select Open

Select L1

Copy data and paste to Excel spread sheet in the column A.

Important: Make sure your convention for decimal points (commas or fullstops) conforms to the spread sheet. If you need to change full stops to commas go to Edit, then Select All, then Replace. In the dialog box replace a full stop for a comma.

Select L2

Copy data and paste to Excel spread sheet in column B

In Excel select the data in the two columns by  holding  the left mouse button and drag it across the columns.

Open the graph drawing menu

Select Scattergram and create your graph.