Do not just drag the file into your mod folder and pray. Follow these steps to avoid a corrupted profile.
For most users, the (updated for 1.40) is superior because it edits your save file directly without enabling mods. You can add €5 or €500 million precisely. euro truck simulator 2 money mod 1.40
Return to the game, change your money (e.g., by getting a speeding fine), and perform a "Next Scan" with the new value. Do not just drag the file into your mod folder and pray