Withdrawing HTML5 into offline wallet

Hiya all

I'm hoping some of you might be able to clarify something for me and put my mind at ease. Probably a full on newbie question but I havent been able to find answers by searching online.

I bought some HTML5 via Bleutrade, which went very well to begin with. However, now it does not let me withdraw the coins into an offline wallet or anywhere else for that matter. The only currency that I can seemingly withdraw is BTC, which of course would result in a loss right now.

Is this normal for HTML5? Are my coins safe with Bleutrade? I'm just worried, given I was always able to cold store my other coins.

Maybe this is all super obvious to the experienced trader, but it's really doing my head in right now.

Any helpful advice (however brief) would be really appreciated.