To test & see if mods would work with this new version of the game, the only thing I did was change the amount of damage the reaper's plasma rifle inflicted. (From 3 to 99) With the new version I downloaded I have noticed that there is no "data" folder, only a "pdata" folder (which only has descriptions of missions). However, in the old modding tools folder there's one that says "data" which lists everything. (constructions, machines, weapons, etc) Weird...
Here's a post where I'll place resources from the past two projects we worked on.
List of Machines: List of Machines.xlsx
OpenMachines Repository (SpringRTS Version): https://sourceforge.net/projects/openmachines/
Machines Legacy Repository (Unreal 4 Version): https://github.com/OpenMachines/machines