A few community tools exist, such as F1 2013 Save Editor by Ryzza5. These provide a GUI but may not work with all game versions (Steam vs. retail, updated vs. vanilla). If using one:
The is not magic—it is just editing a single line of text in a single file. Whether you choose the Notepad method, the ANSI encoding trick, or the third-party editor, you will be back on track in less than five minutes. f1 2013 change name fix