Installing Apps (.apk) from Windows:
Downloaded android apps (.apk) can be installed directly to DuOS from windows by Right-click -> Apply to DuOS or Install in DuOS.
Upon successful installation, a notification will be displayed in Windows Taskbar and App icon will be appeared in Andriod Apps menu.
You can click on the Taskbar ballon to open the Installed app instantly in DuOS.
Note that DuOS has to be keep running while installing APK files.