Anet A6 profile for Cura 3.5. Start Cura once, create a custom printer called "Anet A6" without changing any of the settings and close Cura. Save and overwrite both files in "AppData\Roaming\cura\3.1\definition_changes" and start Cura again.

Anet+A6_settings.inst.cfg

[general]
version = 4
name = Anet A6_settings
definition = custom

[metadata]
setting_version = 5
type = definition_changes

[values]
extruders_enabled_count = 1
gantry_height = 55
machine_depth = 220
machine_end_gcode = M104 S0 ;extruder heater off
	M140 S0 ;heated bed heater off (if you have it)
	G91 ;relative positioning
	G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure
	G1 Z+4 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more
	G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way
	G1 Y210 F9000 ;move out to get part off
	M84 ;steppers off
	G90 ;absolute positioning
machine_heated_bed = True
machine_height = 250
machine_start_gcode = G21 ;metric values
	G90 ;absolute positioning
	M82 ;set extruder to absolute mode
	M107 ;start with the fan off
	G28 X0 Y0 ;move X/Y to min endstops
	G28 Z0 ;move Z to min endstops
	M84 ;steppers off
	M0 S12 ;wait 12 seconds
	M17 ;turn steppers on
	G1 Z10.0 F300 ;move the platform down 10mm
	G92 E0 ;zero the extruded length
	G1 F200 E8 ;extrude 8mm of feed stock
	G92 E0 ;zero the extruded length again
	M0 S5 ;wait 5 seconds
	G1 F9000
	;Put printing message on LCD screen
	M117 Printing...
machine_width = 220
material_diameter = 1.75

custom_extruder_1+%232_settings.inst.cfg

[general]
version = 4
name = custom_extruder_1 #2_settings
definition = custom_extruder_1

[metadata]
setting_version = 5
type = definition_changes

[values]
material_diameter = 1.75

But he need the .json file. =( C:\Program Files\Ultimaker Cura 3.1\resources\definitions, where only .json files. Help please!

It's... C:\Users\YOUR_USER_NAME\AppData\Roaming\cura\3.XX\definition_changes

I have the newest version of Cura and can't find that file path at all to update the settings for the A6! Can someone please help?

How to do so in Ubuntu 18.04?

Doesn't seem to be working. I've copied and replaced both files into the right directory, my Anet is properly put together, as i've tested with one of the stock files (pyramid) and it printer perfectly. Any ideas?

It's working with cura 4.8.
I created a new file in the specified folder (Appdata...) named Anet+A6_settings.inst.cfg , then copied/pasted the code in, and saved. Once cura running, the printer was there with the parameters.