Quite a few of us have had problems with Blackberry AppWorld, especially when installations get stuck in what we in the industry like to call “an unknown state.” Basically, it’s just hosed.
No amount of uninstalling and reinstalling AppWorld will fix the problem. You can wipe your device to fix the problem, but what a royal PITA that can be. You can waste hours resinstalling and getting your device back to where you want it.
Try this simple keystroke sequence when you are in AppWorld next time and see if it works for you.
Press and HOLD the ALT key, then press the following keys in sequence: R S T
(As in “Reset” 
)
Many thanks to the community at CrackBerry.com for providing this and many more tips. If you are a Blackberry user, you owe it to yourself to join this community.
