Use these instructions, but click the button labelled "export to". A pop up window should open which you can use to select the folder you want your .key file written to, and what name you want to give your .key file. Each .key file contains a private key.


Inside the folder you selected there should be a new file with an extension ending in ".key". Open it in notepad and copy your wallet's private key. In the example file below the private key is the bit in red.