Hey guys when triying to install an app I wanted, it required me to install another one called MOBOGENIE, and while I was not able to Install the one I wanted, for my surprise the Mobogenie app, allowed me to update some of the apps installed with the Openmobile Appmall (such as Facebook, twitter, evernote...) and also was able to install some new ones.
you can download it here Mobogenie - The Ultimate Android Market
I used the android browser to download the file and then installed it with appmall.
Hope it works for you too.
PS seems like you have to restart your TP for it to. Recognice the updated stuff