There is only one app for Windows.
I have heard of one other person whose antivirus flagged the app. All you have to do is tell your av to ignore the app.
Av's are known to put up false flags at times.
A number of people have told me they can't connect over the past few days but in every case so far, updating the app solved the problem. Even when they say the have the latest version, come to find out they're using the version from months ago. Latest version is 3.7.3 (as of this moment, published a couple weeks ago). Latest version is always available at: