You are welcome. Thank you for the support!

Of course, no problem. Is this what you need?

Yes, the launcher opened without problems.

Ok, i did all this procedures but the launcher is still not opening.

In T120399#1512213, @BISWizard wrote:

Hello,
Steam didn't properly updated all the files and that is causing the crash. Please delete the folder "C:\Program Files (x86)\Steam\steamapps\common\Arma 3\Launcher" and then verify integrity of the game cache using Steam client to force it to re-download the files:

1. Open Steam.
2. From the Library section, right-click on "Arma 3" and select Properties from the menu.
3. Select the Local files tab and click the Verify integrity of game cache... button.
4. Steam will verify the game's files - this process may take several minutes.