Get the official installer from the Image-Line website . Generate an Offline Key:
There is no official "portable" version of FL Studio produced by Image-Line. While third-party "portable" downloads exist, they are often pirated and carry significant security risks. download fl studio portable better
Grab a 128GB USB 3.0 stick. Download the official FL Studio trial. Install it to that stick. You will spend 15 minutes setting it up, but you will save hundreds of hours of crashing and lost projects. Get the official installer from the Image-Line website