Add another starbase_outpost triggered cost&upkeep ADD MULT modifier in the name of ships category.
(Guilli: Was needed if I recall correctly to get upkeep modifier to work. The normal starbase stuff still exist in the vanilla economic_categories.)

*Add mulit modifiers based on Guilli's Technologies.

• megastructures upkeep modifiers

• starbase_shipyard_build cost MULT ADD modifiers
  
• ship_colonizer cost&upkeep MULT ADD modifiers
  
• ship_corvette cost&upkeep MULT ADD modifiers
  
• ship_destroyer cost&upkeep MULT ADD modifiers
  
• ship_cruiser cost&upkeep MULT ADD modifiers
  
• ship_battleship cost&upkeep MULT ADD modifiers
  
• ship_titan cost&upkeep MULT ADD modifiers
  
• ship_military_station_small cost&upkeep MULT ADD modifiers
  
• ship_science cost&upkeep MULT ADD modifiers
  
• ship_constructor cost&upkeep ADD modifiers
  
• station_gatherers ADD MULT produces cost modifiers
  
• station_researchers ADD MULT produces cost modifiers
  
• station_observers ADD MULT produces cost modifiers

*Add planet_districts_cities upkeep modifiers. (Base on Culture Overhaul mod)

Add triggered_cost_modifier MULT for ship_constructor.

*Add planet triggered planet_jobs_organic_* "ADD" "MULT" modifiers.

*Add planet_jobs_organic "ADD" "MULT" triggered modifiers in planet_jobs.

*Add colonies MULT and ADD produce modifiers.

*Add ship_sections MULT cost modifiers.

*Add stations MULT and ADD produce, upkeep modifiers.

*Add station_gatherers MULT and ADD produce, cost modifiers.

*Add station_researchers MULT and ADD produce, cost modifiers.

*Add station_observers MULT and ADD produce, cost modifiers.

*Add station_observer_missions MULT and ADD produce, cost modifiers.

*Add starbase_stations ADD cost modifiers.

*Add planet_structures MULT and ADD cost, upkeep modifiers.

*Add planet_districts MULT and ADD cost, upkeep modifiers.

#Based on Guilli's Planet Modifiers that messed up some of the upkeep modifiers##

*Change the version tag to 2.3.* as the critical bugs are patched up.

*Nothing changed but 2.3.1 tag.

*Add missing use_for_ai_budget for campaigns.