To echo what dvj said, yes it is likely an older version you are using. Apparently submissions to the marketplace can take weeks or even months to gain approval from MS/Asobo/whoever is managing the marketplace. Which is a shame because it would be so nice to just have everything in one place and not have to worry about "oh, where did I buy this thing again? what e-mail did I use to purchase it. oh, the developer who made this thing no longer exists and the only way to activate my key is now non-existent." etc.
You can try checking for an update in the content manager in game. From the main menu, click the Profile tab and then Content Manager. On the right hand side you will be able see whether any of the content you own has an update available. Looks like 1.13 is the latest version available from Simmarket.