Rocks'n'Diamonds

I had R n D before and I uninstal it. Then I instal it agin (in an other direction), the old high score was still on the high score list.

Another thing: I can play every levels without to unlock them but my friend cant?

about your first question:

all the personal data is stored in the My Documents/Rocks 'n' Diamonds folder. So remove it there.

2nd question:

in the main menu go to setup-game settings and there you can turn the handicap on or off. If the handicap is on, the levels whcih have not been solved yet are locked.

thanks