The easiest way to install applications on the M-Series Smart Glasses is to connect the device to Wi-Fi and manage the applications from the Vuzix App Store. Once you have a valid account, simply click on My Account then My Devices and follow the instructions to register your device to your account. Applications can then be selected and pushed to your device.
Applications not available on the Vuzix App Store can also be installed. They must be downloaded from 3rd party sites and can then be pushed to the device by following the procedure here.