download last version of CBA on ArmaHolic
Copy @CBA_A3 folder in the default Arma3 folder
Use Launcher
Add CBA with Launcher as a local addon
check for signed addon (green mark is OK)
Launch game with this addon enabled
error msg is:
"key not found for signature. C:\programFiles(x86)\Steam\steamapps\common\Arma3\@CBA_A3\addons\cba_ai.cba_a3_beta4.bisign test failed"