Hi, with trapped you mean you sent them colored coins to addresses in the wallet without a fee high enough to transfer them out?

How is this a problem with MultibitHD? MultibitHD doens't allow you to export your keys because it's kept simple to help most users manage their funds and not break everything.

If you want to keep your funds in a private key that you can see, you'll need to send money to pay the fees to wallet and then transfer out to Electrum, which allows to export, or cold storage addresses.