Ok so i noticed this the other day and then confirmed it again this morning.
I downloaded a trial of a game, the trial ran out so i deleted the game..However there was an icon on my screen for the archived file of the game. If i delete that it asks for a reboot which i accpet but once i boot back up AppWorld is gone and i need to re-install.
Now i do not know if this has anything to do with what theme i am using. I am using the elecite Hero theme.
If anyone else has seen this or might even knows the fix, please let me know. Thanks.