Its possible.

Literally, it was one line of code to get it to work on the master def.xml. To allow for the spurious minor tech at the beginning of the xml. This was causing a crash.

To do what you suggested, I would have to revisit the tree engine.

I am going to have to recode the stat icon logic anyway. The new xmls have a different data naming format. So many inconsistances.

Let me see what I can come up with.

Question:
I see now the Tech Editor has a DLC option.
When I activate it I see a Master tech tree that I cannot clone or edit.
What I should do with it?
I only want to remove specializations and maybe edit standard tech trees. I have Crusade but before I play it for first time I want to be sure specializations are off.

Yeap I noticed not only tech tree but many other things changed, my custom faction is not compatible anymore, most likely many of my mods arghh...

I can't and won't play GC3 until you release an updated Tech Tree editor for Crusades. 
It's too complicated and time consuming to create new tech trees now. 

Horemvore suggested a way how to do it but it's too much work.
https://forums.galciv3.com/483207/page/1/#3678561  
I blame Stardock for this they made things too complicate for modders.

Whenever you find out I will be thankful.   

You can appened to both MasterTechTreeDefs.xml and AbilityDefs.xml, I have done so for GST. The game UI sorts it all in the ingame Tech Tree just fine, as long as your pre req's are good, if not this can cause some weird glitches

The Crusade systems is actually easier to work with, you just need to get your head around how stuff works together.

@treborblue - have you thought about importing the UI windows from the actuall game? They are all in xml.

Note in the 2.14 Opt-in Patch for better or worse. StarDock has started to delete the duplicate race techs and merge those races into the "standard" technology tree.  the buildings will retain the custom race naming (although this currently causes issues as not all the "standard" buildings "disappear" for custom races).

Synesthetic Manufacturing and Research techs were removed and the improvements changed to refer to the "standard" equivalent technologies.  Similarly, the Slaver (Zealots) Manufacturing, Research, and Morale (haven't finished checking economy, influence, trade tech changes)  customized race techs were removed and the improvements changed to refer to the "standard" equivalent technologies.  Same for the Certain (Altarian) Morale techs.  I suspect they will continue to eliminate duplicate race techs, although the unique custom techs for buildings no one else gets will likely remain.  Currently Xeno Entertainment is still "duplicated" for Amphibious and Devout races but it also enables a Citizen so either that ability gets duplicated and Xeno Entertainment "disappeared" for them or more merging needs to happen for those custom race's Morale techs.

Horemvore is right it is very easy to have the Master Tech Tree generation crash if you leave references to deleted techs and especially deleted specialization techs.  I have seen it show a technology connected in two places when I was moving techs around (although that was many changes ago and I don't remember the details of what I did not just to create a new branch but duplicate branches)

Small update. Version 0.1.7.5

https://drive.google.com/open?id=0ByP98bukmWCxLVZGUGMyX0o1UkE this is just the exe. You still need the full version, see OP.

Fixed bug introduced in last build.

Fixed Some Techs drawn in wrong Tech Age.

Race Ability window shows abilities in alphabetical order. Reloads last saved.

Added check for Crusade DLC

This one just for you alphaprior. Added partial mod support. (No append mod support ATM)

Can clone Master Tree for editing, specializations can be removed, techs re-arranged etc. (stat editor still needs updating). Not tested thoroughly.

Please report any bugs.

The path should be set exactly as it was before, pointing at your Galciv3 directory.

..\SteamGames\Steam\SteamApps\common\Galactic Civilizations III\

If this is set correctly, on load it checks for,

..\DLC\EXP2_Crusade\

Just check your paths again and report back.

Update available 0.1.7.6

See OP for details

Quoting alphaprior,

reply 144

             

 

Question1: I see the game keeps the old tech trees are they still used?
When I want to set a requirement for an improvement for Terrans should I refer to MasterEnvironmentalResequencing or TerranEnvironmentalResequencing?

Question2: When I filter by ability I still see the same tree only for certain race, so if I make changes in the MasterTree e.g. the cost of a tech or the order in the tree, the changes are lmited to that race or the applied to entire MasterTree?

I'm not really a modder but,

1. The old tech trees are for the base game.

2. There is only one tech tree now. Master Tree. If you change a tech that does not require a race ability, it will affect all races that are eligible to research that tech.

If you wan it to be race specific. i.e. the Terrans you will have to make a tech that requires the abilities specific to the Terrans.

Full modding support is not in the tool yet but it will be soon.

Here's my question can I pull one, or some of the old techs by copying to the dlc master tree.

Q1: The old tech trees are in the game for those who do not have crusade. They need the old filestructure. Maybe the files will be removed in the crusade version. We have lots of files duplicated and right now its a big mess. I think stardock will fix this with a patch soon. So if you use Crusade, forget about the old trees. You need only the the MasterTree. IF you want to have Race Specific Tech, means unique to just one race, you need to create the Ability, for example "Terran" in the AbilityDefs.xml and you have to create the new techs in the master tree with the addition

<Prerequ>
      <Techs>
        <Option>TechTree</Option>
      </Techs>
      <RaceTrait>
        <Option>Terran</Option>
      </RaceTrait>
      <TechAge>
        <Option>AgeOfAscension</Option>
      </TechAge>
    </Prerequ>

Q2: Techs are not anymore connected to a specific race. In crusade, races have specific abilities and this creates a different tech tree. Means if two races share the same abilities, they have the same tech tree. So every change in the MasterTree on a tech, will affect any race, who is able to use that specific tech. To make things a bit more comlicated, you can also mark some techs to be unusable for some races with certain abilities.

<Preclusions>
      <RaceTrait>
        <Option>SyntheticLife</Option>
        <Option>SiliconBasedLife</Option>
      </RaceTrait>
    </Preclusions>

would mean, this tech wont be available for races with the ability Sinthetic Life and Silicon based Life.

Hope this helps a bit.