You have to buy per-seat licenses for v2.x. Per seat means: everyone who operates the designer, generates code etc.
A v2.x license gives you access to all versions of v2.x (latest is currently v2.5) and earlier, so also v1.0.2005.1. The v2.x license file isn't compatible with v1.x but we'll mail you one without charge.
All versions are downloadable with their latest build from the customer area, so v1.0.2005.1 is available as installer form, the SDK, the sourcecode for the various elements etc., it's available to you.