Open the application and click the Read icon. Right-click on your email and go to Save To > On My PC > Create Folder. Enter a directory name and click OK. After that, right-click on the created folder below Saved on My PC and press Save Folder As. Type a name for the file, select a location and click Save. This is the only way to save/download the email directly on your PC. Also, you can open the email and copy its content in a document from your computer.