I have an issue with Ubuntu Software Center. It's not allowing me to install software that I had previously downloaded. For example, if I download Google Earth (x64), Ubuntu Software Center opens, and when I click install, it hangs and does not install the application.
That happens to me with all the softwares I have downloaded (Vivaldi, Chrome, Opera, Polarr; N1, ...). Although I have these softwares installed, because I did it under Ubuntu 15.10(x64) and then upgrade to version 16.04LTS (x64). Is there any way to fix it or using another installer?, or, How I could use Synaptic to install pre-downloaded software?. Thanks.