[OLD VERSION]
PLEASE CHECK THE LATEST RELEASE:
https://www.digitalcombatsimulator.com/en/files/3318254/
This is a simple python script to remove nation livery restrictions on ALL modules you have installed (Official modules, third party modules, downloaded modules).
Check
https://github.com/LombardiDaniel/dcs-livery-unlocker for more info.
Just point the app to your DCS install folder and to the Saved Games folder on your computer. Note: do NOT point it to Saved Games/DCS or Saved Games/DCS.openbeta, the script will find those automatically.