FL Studio Producer Edition 20.6.2 (Build 1549) was a specific maintenance update released by Image-Line around January 2020. If you are looking for a "patch" for this specific version, it is important to distinguish between official software updates and unofficial third-party modifications. Official Version Details
The 20.6.2 Build 1549 Patch addresses several issues and bugs: FL Studio Producer Edition 20.6.2 Build 1549 Patch
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Main Pitch: Users gained the ability to specify pitch in Hz via the right-click "Type value" menu. FL Studio Producer Edition 20
, Euclidean rhythm support in the step sequencer, and internal MIDI recording ("Burn MIDI to"). Build 1549 Specifics : This specific build focused on FL Studio Producer Edition 20.6.2 Build 1549 Patch