Windows Defender at the moment is giving a false positive, so that could be blocking it: https://www.virustotal.co ... analysis/1531522085/
If you're unable, or not comfortable white-listing it, you can use ArmA3Sync as it's compatible. It's available for download here: ftp://www.sonsofexiled.fr/ArmA ... installer-1-6-97.exe
Please note there is a technical issue with this version when it comes to updating the repos. If you do encounter it, there is a solution that we can run you through.
"Jokes on them, I was only pretending to be retarded."
"With the first link, the chain is forged. The first speech censured... the first thought forbidden... the first freedom denied – chains us all irrevocably."