Yes you are still able the to claim (we call it dig) your clams from old address, if you have access to your private keys belonging to those address and they were funded when the distribution was made, you can claim it can enjoy your clam for whatever you wish to.

You can use a Clam wallet, like the clam client (a local wallet) to check if your addresses got funded, you will get around 4.60 clam per each diggable address, also you can use services like Just-dice to do check if your address, in the chat there is a function to dig with a command that is /dig (address) that is for checking if it's funded, you can find more info about how to dig in the FAQ if you want to do the claim via Just-Dice. Also you can use other methods like BayAreaCoins site in case you want you clams in btc for a fee they can do that for you I think.