Copied from the German site regarding the update:

Main additional Features and Improvements on ver 1.1

Auto Fill In function "On" at power on

Increased arranger polyphony from 32 to 48 notes

Only one volume slider for all Harmonic Bars sections

Update Music Assistant/User Program, Styles and Song by Floppy disk

The Style Make Up tools changes shall not be erased in the Style Composer function

Import of the ".sth" style format

Import of the G-1000 & VA-7/76 User Programs

Added the parameter “Fill-In on User Program Change” in the Utility/Global

Improvement of the Tone selection of the SRX category
Fixed in this update:Tone selection, 16 track Sequencer, Vocal Harmonist, User Program, Style Composer, Style Makeup Tools, Transpose