Reposting from an official post at the Lightworks Forum:
We will soon be releasing the Windows version of Lightworks. This will contain a long list of improvements, including drag-and-drop, and significantly improved codec support. It will also mark the start of our ultra low-cost Pro Membership program, where if you chose to support Lightworks in this way, you’ll have access to additional features and services.
There will always be free versions of Lightworks and we will continue to develop these.
Please note that we will not be releasing any other versions of Lightworks yet, but that as soon as the Windows version is released, we will be making more resources available to accelerate porting Lightworks to Linux and to OS X
A full and detailed announcement of the launch schedule and features of the new version will be made soon.