It doesn't matter where you download the cracked apps from. Alternatively, you can also use the AppStore to inform you of the update of your apps, just open and select the 'update' tab. After which you can download the updated cracked apps from here, apptrackr home
. Delete the old version and sync the latest version with iTunes. Ensure you have the correct version of Appsync installed first. This is how I would do it coz I don't use Installous.