The newer licenses for ControlST (V5 and later) have the raw capability for one-year licenses, but I'm not sure GE sells them that way to external customers. It isn't an option on the part number flowchart (google search for GHT-200060), but maybe something has been added recently. I'd call GE (also look at GHT-200060 for sales contact info).
CSA, you are correct. GE Does not sell that one year temp license out to the public. You must buy full licenses. However, in special circumstances, they may allow special pricing on the licenses.