To use the Converter, you can find the Profile Template here https://ghost.shoes/l/wraith-profile-convert.
Once you have created all your Profiles, click the File button in the top left corner. Then go down to Download as and click it. Then go down to Comma-separated values (.csv, current sheet) and click it. This will download your Profile sheet as a CSV, which is the necessary format to import your own Profiles spreadsheet into Wraith.
You can then Drag and Drop or Choose the .CSV at the top section in the Covert tool. After it is validated you can then select which bot(s) you would like to convert the .CSV into. Click Convert and then choose which directory you would like to save the converted profiles to.
At the time this guide was written, the current version of Wraith is 2.0.0 and is subject to change.