Between June 2007 and August 2008, I spent some 100 to 200 hours changing formulae (that's the quick part) and then testing them to see which ones produced interesting images. It turned out that creating good formulae was much more difficult than I expected. In the process I made and saved some 1,600 fractals. That's not counting about 30,000 that I partially made but did not save. I have finished this process, so Sterling2 now has 50 formulae, all different from those of Sterling. You should be able to make interesting fractals using any of the 50. If you have any problems or questions, feel free to email me at tad@ soler7.com.
The zip file contains brief instructions. There is no installation - just put the exe and dll files in the same directory and fire up the exe. You will be making fractals within seconds! If you wish, you can use the bundled ico file to change the program icon. Here are two screen shots.
Is Sterling2 better than Sterling? I don't know, but it has the advantage of being free, ie anyone can download and use the program. Please don't try to sell it though. All the images shown below were created by Sterling2. The captions mention which formula (F) and render (R) were used for each. You can use parameter files from Sterling in Sterling2 (and vice versa), but they will draw different images. It's worth a try.
The 48 pictures in Rooms 20 to 23 do not give a good idea of the wide range of fractals that can be made with Sterling2. They are some of the best I have made using the program, but that's according to my taste, which runs to complex structure, organic shapes, symmetry and sumptuous colours. For instance, there is a disproportionate number of images made using Render 26.