Simplify 3D can't home the Z-axis, might be a switch issue

Thanks a lot for all your input, I finally managed to get things working with Simplify3D

I'm using:
G28; home X,Y,Z axis
G1 Z5 F5000; will lift Z axis by 5 mm
M565 Z-1.14; sets the offset for the auto-leveling mechanism by 1.14 mm
G29; runs auto-level
G1 Z5; prevents the initial carving of the painters tape

The M565 has an opposite z-offset effect, I was previously using a +1.12 Z offset with Simplify 3D

I'm guessing things didn't work for me with V1 (currently at V4, thanks for the link) because I was setting the M565 to positive values

Still the need for a manual calibration is slightly irritating (the M565 offset ...)