Haven't seen anything about this addressed yet, so I'm gonna give it a shot.

I have been playing with both the Improvements and  Tech Tree Editors, and I wanted to make up a tree for my custom race, the Therian Empire. Mostly I just wanted to make cosmetic changes to mostly the name and descriptions of things, to make them more to the race itself. I was trying this with the XML file for the Minor Race tech tree, and I did copy that and then changed the name to Therian_TechTree.xml. I tried the changes 1st by just changing the names of a couple things in the MinorRace xml and those worked, but if I tired using the new Therian TechTree file when picking the tech for a race, halfway thought the new game loading in, it crashes right to the desktop without any warning, so I am guessing there is an error I am causing in the Therian TechTree xml file.

As for the Improvements, how do I make Improvements that are race specific. Is there a set of files for improvements for each race, or are they all just from one for all to use?