ubuntu@localhost:~$ sudo snappy list -v
Name        Date       Version Developer 
ubuntu-core 2015-04-17 400     ubuntu*   
ubuntu-core 2015-04-20 404     ubuntu!   
hello-world 2015-04-20 1.0.11  canonical 
hello-world 2015-04-20 1.5     jdstrand* 
Reboot to use the new ubuntu-core.
ubuntu@localhost:~$ snappy search hello-world --show-all
Name                 Version Summary                        
hello-world          1.0.11  hello-world                    
hello-world.jdstrand 1.5     hello-world                    
8nzc1x4iim2xj1g2ul64 43      Returns for store credit only.