1. Click the round blue Start thing in the left corner
2. Click Control Panel
3. Click Folder Options
4. Click the View tab
5. Click Show hidden files and folders
6. If you want to see system files as well, unclick Hide protected operating system files (Recommended)
7. Click OK
there u go... i doubt this being the case nut it s worth a try
Greetings and goodluck, ...Joshua
PS you could also just copy someone else's settings.dat and throw it in the right folder before starting MX again