Image-Line offers a fully functional trial of FL Studio. You can download the latest version (which includes all features of Build 1549 and more) for free from their website. The only limitation? You can re-open saved projects. You can export WAV/MP3, and test every Producer Edition feature for as long as you want.
FL Studio Producer Edition costs $199 (often on sale for $179). This includes: FL Studio Producer Edition 20.6.2 Build 1549 Patch