The FL Studio trial version is typically valid indefinitely, meaning you can use it for as long as you like. However, it does come with specific limitations. The most notable restriction is that you cannot save your work and reopen it later; once you close the software, your project will be lost unless you purchase the full version. Additionally, the trial version does not include certain features and plugins that are available in the paid editions. Despite these limitations, the trial version provides a good opportunity to explore the software and its capabilities before making a purchase decision.