Was a bit impatient with it, so called tech support.
It was super simple, you (I) just have to:
1) select all bars (including bar changes, etc) copy
2) open new midi file
3)paste


I do not know how I overlooked that, it was right under my nose smile It would be a nice option to be able to save just chord grid, with all bar changes, parts etc, but without the style or midi. Heading to "request" section.