Hello I also tried downloading recently and also had this problem and I think I found a solution (at least it works for me) that I think I could share here just in case there are others who also have the same problem as us…although I admit that the reply is late… 
https://www.microsoft.com/en-us/download/details.aspx?id=26999
^If your computer is using Windows: Basically from this website, download both “vcredist_x64.exe” and “vcredist_x86.exe” into your computer. This would allow you to open the Avogadro’s application.
^If you would like to have slightly more information on why this happens.
If you are using computers that are not Windows, I am sorry I don’t think I can help much.