You can delete a file in your File Manager in two simple ways.

OPTION 1 - select a file by clicking the checkbox next to it. Then RIGHT click on the filename or row and select "Delete".

OPTION 2 - select a file by clicking the checkbox next to it (or click on the filename). Then HOVER over the row, and a DROP DOWN ARROW will appear.

Then click the drop down box and various options will show up. Click the DELETE option.

A confirmation box will appear asking you to confirm that you really want to delete the file.