Is there some hack that can prevent the upgrade of an AppStore app? I usually just do "upgrade all", but now I have an app I would like to preserve in a specific version, and it is a nuisance having to upgrade all the other one at a time. So if there was a JB tweak where you could specify which apps to hide from the upgrade, that would be nice. Or some way to do it manually, e.g. by copying the app to another place. By the way, can I manually downgrade an app later, if I e.g. save a copy of the directory it is in, and later copy it back. Or would that just cause trouble?