Change to less than GLSL 4.0 or add Linux support?

[qwertious]

I have a Linux computer. This usually doesn't mean that I can't run .exe files because I can use Wine. However, this one says that it has to have GLSL 4.0, which is not supported on Linux. I have been looking for AGES for a good microtonal keyboard, and this steps up the game like 1000 levels!