I think it is 15 days trial.
Anyway, Volume Logic and Octimax, as well as Stereotool or Audioproc, are not really enhacers, but compressors - limiters, much like Orban or other FM processors. That's the catch: you can listen to your own music, ina rich and balanced fashion.
The problem is that Volume Logic, which turned out to be a lot better than Octimax, is a Winamp Output plugin, which I can't use in another host. For example (and I might be going out of bounds here), you can use Mixmeister to assemble a CD playlist, controlling at your taste the overlaping of each song with the one after, and balance all the music with the plugin. That is, if the plugin is DSP, VST or Direct-X, but not if it is Output plugin. So I thought there could be a converter but it seems not. Still looking, though, if anyone knows one.