KITSUNE500'S PROFILE

I was working on a game for a while and sending updated versions to my beta tester. I had it all saved on my flash drive but recently my flash drive got broken so I lost everything on it. My beta tester sent me back the latest version I had sent him to test, but it's the encrypted version so I can't open it up and keep working on it. I know there is a decrypting tool that can be downloaded to extract all my data, but mcAfee says it has a virus and I can't risk an infection on my computer. Is there another solution? Maybe an online tool?