I found the answer, I needed to edit the data.zip\ui_nextgen\common\default.vis file:

Spoiler: Edited default.vis file:

[Label200m-6500m] ( original value [Label600m-4300m] )
area=0,1,2
poi="Settlement.class1", "defaultbd", "label_settlements", 14,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class11", "default", "label_settlements", 10,"settlements",3

[Label6500m-13km] ( original value [Label4300m-13km] )
area=6,7,2
poi="Settlement.class1", "defaultbd", "label_settlements", 14,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class10", "defaultbd", "label_settlements", 10,"settlements",3

[Label13km-25km]
area=6,7
poi="Settlement.class0", "defaultbd", "label_settlements", 16,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class9", "defaultbd", "label_settlements", 10,"settlements",3

[Label25km-45km]
area=6,7
poi="Settlement.class0", "defaultbd", "label_settlements", 16,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class8", "defaultbd", "label_settlements", 10,"settlements",3

[Label45km-120km]
area=6,7
poi="Settlement.class0", "defaultbd", "label_settlements", 16,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class7", "defaultbd", "label_settlements", 10,"settlements",3

[Label120km-170km]
area=6,7
poi="Settlement.class0", "defaultbd", "label_settlements", 16,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class6", "defaultbd", "label_settlements", 10,"settlements",3

[Label170km-300km]
area=6,7
poi="Settlement.class0", "defaultbd", "label_settlements", 16,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class4", "defaultbd", "label_settlements", 11,"settlements",3

[Label300km-410km]
area=6,7
poi="Settlement.class0", "defaultbd", "label_settlements", 16,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class3", "defaultbd", "label_settlements", 12,"settlements",2

[Label410km-800km]
area=6
poi="Settlement.class0", "defaultbd", "label_settlements", 16,"settlements",1
+++++++++++++++++++++++++++++++++++++++++++++++
poi="Settlement.class2", "defaultbd", "label_settlements", 13,"settlements",2