I don't use AppSync and it also stopped working for me. But I found this fix that worked. Thx to the original poster.
"Use iFile or other file explorer to navigate to var/mobile/Library/caches and delete the following two files:
com.apple.mobile.installation.plist
com.apple.LaunchServices-045.csstore
and reboot. Your apps will be missing, but dont be alarmed, they come back automatically over the first minute or so."
I don't know how you found that but thank you. Finally restored this also fixed my weather app that wouldn't open....thanks a bunch!!!! Back to tweaking