A: No. Image-Line used to sell physical USB eLicensers, but they discontinued them in 2018 in favor of online account unlocking.
Even if you cannot run FL Studio from a USB on a restricted computer, you can carry your configuration. You can back up your FL Studio settings folder and your sample library on a portable drive. This allows you to quickly set up a legitimate installation on a friend's computer or a studio computer with your own snappoints, templates, and presets. Download Fl Studio Portable
If your absolute requirement is a legitimate portable DAW that requires no installation (perhaps for use on a locked-down school computer), there are free and open-source alternatives that support this feature natively. Examples include LMMS or older versions of Reaper (which can be run portably). While they have different workflows than FL Studio, they are legal, safe, and functional solutions for production on the go. You can back up your FL Studio settings
Avoid the "installation" process that requires admin privileges on public computers. The Reality Check: Official vs. Unofficial Versions Examples include LMMS or older versions of Reaper
If you are running FL Studio from an external drive or a laptop, ensure the hardware meets these minimums for a smooth experience: