As long as you were a SM, if you didn't retire and you wish to return, you can return after an absence as the same as you were before. So if you want, you can email Sa at membership@tarvalon.net to go about getting your rank and permissions back.
That sounds about right, I was probably a Green Aspirant at the end right before you disappeared.
And no need for the honorific, or even the whole name, most SMs call me Roh