1. Open Mac App Store
2. Launch Alfred with hot key (cmd + space)
3. Hit cmd + , to launch Alfred Preferences
4. Click General tab
You will this this:
I can reproduce it each time Im relaunching Mac App Store. On the first time my MAS even crashed.
So maybe sandboxing is not so bad? It's weird when app you bought can crash other system apps.
Ironically, MAS and Alfred don't like each other.