Version 12 was the first to fully integrate multitouch across the mixer, channel settings, and control surfaces, allowing for "tactile" mixing. Why "Producer Edition" Matters FL Studio 12 Reference Manual PDF - Scribd

This version introduced true multi-touch support, allowing producers to mix using physical touchscreens. 32-Bit vs. 64-Bit Architecture

The most noticeable update in FL Studio 12 is the fully overhauled user interface. Image-Line transitioned the software to a completely vectorized and scalable design.

FL Studio 12.0.1 Producer Edition solved this friction by shipping with two separate native executables:

If you have a license for FL Studio, you can actually download every legacy version from your Image-Line account. Go back and try 12.0.1—you might find that your creativity flows better without the bloat of the modern updates.