If you let the account lapse, it is going to cost you to get back in. Sorry.
The deal we have with Hush only covers the free account which expires if you don't access it every three weeks. If you let it expire, getting it back is strictly between you and Hushmail. Sorry, that's just how it is. I had it pounded into my head a couple years back that Platinum does NOT include a Hushmail upgrade.
We use Hush so that your username @ elitefitness.com mail never touches an EF server. Also the version of the Hushmail software we use is not the lame one that sends your passphrase to Hush. It only decrypts on your machine, not on the Hush server.