Did you look at the FAQ answer that Barbara linked to in that thread? It gives details about backing up your savegame files and restoring them if possible. As deathwing says, your problem looks like an issue with the savegame files, not the program itself, so there should be no need to uninstall and reinstall the game.

Even so, uninstalling the game doesn't necessarily remove the savegame files; that needs a separate operation.