I made different packages for new games.
You can only use one of them at a time and it requires a new game for the stats to apply. The changes stick the entire game even if you uninstall the mod.

m_1_NG_StamMod - double Stamina
m_1_NG_XPMod - twice the XP from any source
m_1_NG_StamXPMod - double Stamina and twice the XP from any source

Installation:

• Extract the file to ELEX\data\packed, start a new game
  

Uninstall:

• Remove the file from your ELEX directory, start a new game
  

Changes:

• Updated files to ELEX Version 1.0.2946.0