Mac - Problems! Help needed.

Okay guys, really need some help on what is probably a straight forward issue.

So for a reason not worth going into, i uninstalled the game, for my mac, after having it work fine for months. This was a digital download and when trying to reinstall, it does so correctly then comes up with the eSellerate software delivery wizard, which i remember from when i first downloaded it. So when agreeing to the terms and conditions, the application quits 'unexpectedly'. Giving me the option of 'close, report or reopen'. Now of which solve my problem.

Does anyone have any idea what is going on?

Sorry to be a hassle and waste peoples time, it just hurts me to not continue with my saved games. :-(