Unfortunately those log files aren't telling us too much.
Repodudeify, that's likely not a factor, but if you've just recovered from some viruses it may not hurt to try re-installation again.
Do either of you know if you are able to run other games made in Unity?
We may have to wait to see if this mystery issue is fixed in Alpha 15, as we've made a lot of changes which could have addressed whatever is happening.