Here are some event data right after trying update the Store Beta.
Code:EventData Message Product data not found for (2) 'Microsoft.WindowsStore_8wekyb3d8bbwe' Function GetProductData Error Code -2147024894 Source enduser\windowsupdate\client\installagent\dll\storeappinfo.cpp Line Number 954
Here's some more fix-it data for a croaked Store Beta. Site is NeoWin, which has been quoted often, even by Shawn. Take a look... can't hurt!
PSA: The Store Beta app doesns how to fix it
Last edited by NickTh; 26 Mar 2015 at 02:43. Reason: Wrong emoticon :P