How to prevent the second extrudeur to hurt and unstick the printed PLA or ABS when printing litle things ?
You need to make sure they are exactly the same height (distance from the bed).
If they are not, the instructions on how to adjust them is on page 61 of the manual:
Also, if you're not currently using the second extruder, you can move it a little higher so it's out of the way.
Print settings in the Creatr Software can be directly updated in under 'print'.
The latest Simplify 3D profiles can be downloaded using the following links:
Bolt - Simplify3D settings
Bolt Pro - Simplify3D settings
To use the profiles, choose File, then Import FFF Profile and be sure to select the correct profile in your process. You can also watch this video.
Request more information on the Bolt (Pro) firmware and how to update this via the Ticket System
Bolt Pro Firmware