Posting the XML file like that is not very accurate, because it might be changed by the forum software so, even if it was corrupted, it wouldn't show.
It doesn't look wrong at first sight but, it's empty so, you might as well remove it, just to be sure. The sim doesn't need it.
If that doesn't fix the problem, perhaps your problem is different, and it's just the antivirus preventing the program from starting, so you should try to install with the antivirus disabled, then configure the antivirus to exclude the Addon Manager folder from scanning, before starting the sim.