1) open the wallet that you used to a access happy1
2) open your account overview for happy1
3) click on "permissions"
4) make sure you have the "active permissions" tab open
5) click on the public key (a long sequence of chars starting with BTS)
6) in the popup click "show" (needs an unlocked wallet)
7) copy the appearing stream somewhere safe (this is the private key that will give access to your account's funds)
now go to your settings
9) wallet management console
10) click "new wallet" and create a new empty wallet
11) in your new wallet click "import keys"
12) paste the key from above
Done
Make sure you understand the first paragraph of
http://docs.bitshares.eu/bitshares/user/account-permissions.html