To set the Launchpad Pro up with Ableton Live 11 please connect your Launchpad and then open Ableton. 

Then go to the Preferences (Options > Preferences) and go to the Link/Tempo/MIDI tab:

Then select the Launchpad Pro as the Control Surface: 

Then set the Launchpad Pro for the Input and Output ports:

Then match the settings below:

Note that enabling MPE for the input port means that all MIDI channels are in use, so it's not possible to set a track to discretely respond to one MIDI channel. You may wish to disable it if not using Polyphonic Aftertouch data from the pads.

To set the Launchpad Pro up with Ableton Live 11 please connect your Launchpad and then open Ableton. 

Then go to the Preferences (Ableton Live > Preferences/Settings) and go to the Link/Tempo/MIDI tab:

Then select the Launchpad Pro as the Control Surface: 

Then set the Launchpad Pro (Live Port) and for the Input and Output ports:

Then match the settings below:

Note that enabling MPE for the input port means that all MIDI channels are in use, so it's not possible to set a track to discretely respond to one MIDI channel. You may wish to disable it if not using Polyphonic Aftertouch data from the pads.

To set the Launchpad Pro up with Ableton Live 10 please connect your Launchpad and then open Ableton. 

Then go to the Preferences (Ableton Live > Preferences) and go to the Link/MIDI tab:

Then select the Launchpad Pro as the Control Surface: 

Then set the Launchpad Pro for the Input and Output ports:

Then match the settings below:

To set the Launchpad Pro up with Ableton Live 10 please connect your Launchpad and then open Ableton. 

Then go to the Preferences (Ableton Live > Preferences/Settings) and go to the Link/MIDI tab:

Then select the Launchpad Pro as the Control Surface: 

Then set the Launchpad Pro (Live Port) for the Input and Output ports:

Then match the settings below: