Hello,
the reason why GeoControl is not maintained anymore and why updates for GeoControl 1 and 2 will not be supported any more can be read here:
http://www.bitethebytes.net/forum/index.php/Thread/9-GeoControl-is-now-WorldCreator/WorldCreator is GeoControl 3 - we had to take the old code and rewrite a lot of stuff to make it stable and bring it back for the Mac, too. Also, WorldCreator supports the powerful sediment system with sediment filters.
Currently we are working hard on version 2 which will have a modern UI, will run on any platform and where generation is much much faster. We will also support much higher resolutions (up to 16k) and we will use the GPU to speed up a lot of things. Also some new features will arrive so it is worth upgrading.
But of course we do not develop for free - new versions take a specific amount of time and money until they are finished. So we cannot make any new major update (v.1 to v.2 and so on) for free - hope you understand this.
However, we offer every GeoControl customer a 30% discount when upgrading to WorldCreator.
* IMPORTANT *
Be careful not to purchase any GeoControl versions from resellers. We have informed all resellers that GeoControl is no longer supported with updates. Many resellers do not care about that and they still offer it in their shops without informing their customers.
Best