Hi Placebo,
That was my first suspicion. Their tech support suggested the same thing regarding the download manager. I downloaded the manager they suggested and then redownloaded both files. I then got another error saying there was a missing DLL file. I then researched that issue and found a fix on Microsoft. So everything is working now and I was up until 3am playing this damn game.
With the initial experience of the errors and then getting immersed in a battle I made in the editor I'm getting reminded of everything I hated and loved about OFP...lol.
Thanks!