Wrong forum. -> Modding Forum.

You need to adjust the following files in the GameInfo folder:

RESEARCHSUBJECT_CAPITALSHIP_MAXBUYLEVELPHASE0.entity
RESEARCHSUBJECT_CAPITALSHIP_MAXBUYLEVELPSI0.entity
RESEARCHSUBJECT_CAPITALSHIP_MAXBUYLEVELTECH0.entity

Now, in the normal GameInfo folder those files are compiled, so you can't read them (well, you can, but it's just garbled mess).

So, download the 1.04 modder resources from here to get the files in a readable way. Extract the GameInfo folder from this file and copy it into your mod folder. There are then the files mentioned above. In those files change either
researchModifier
modifierType "CapitalShipMaxTrainableLevel"
baseValue 2.000000
perLevelValue 1.000000

or

MaxNumResearchLevels 1

to something higher.

Or alternatively, download this .zip file and extract it into your mod folder and enable it as a mod.

You'll now be able to upgrade your ships level to 10. (If you've researched it, that is. )

When I do this, the level 4 upgrade cost is -2172394872309. 

 

What the heck could be goin on?

 

In the gameplay data all costs are set to 500. upgrade 1 and 2 are fine, they cost 500. But then bam, to get to the next level it's this really strange number. You can click it, and it sets your credits to a permanent 1. 

LOL yes. But what is causing the upgrade to cost -217239blahblahblah. And if it's - shouldn't i get refunded? haha