Solspace Discontinues Support for ExpressionEngine 1.x Add-ons
ExpressionEngine 2.0 has been around for 3 years now. EllisLab had recently stated that ExpressionEngine 1.x is now a legacy product, and is no longer for sale.
Solspace is now no longer supporting ExpressionEngine 1.x in their software, starting with the release of Calendar 1.8. (Super Search 2 and Freeform 4 were new add-ons, and never had an ExpressionEngine 1 counterpart.)