The license key file must be named "QViewer.key". Do not rename.
Drag your license file "QViewer.key" onto any QViewer window. Drop when you see the "Install license key" message.
In the dialog box, enter the license email. This is the license email address you specified in your order. For a Personal license, it will be your email address. For Team/Enterprise license, it may be a generic address.
If the email is correct, you will receive the a message indicating licensing was successful.
Note: For Team or Enterprise license holders using a shared install, the license key drop needs to be performed only once, by a user with Administrator rights. Each new userid using the Qviewer shared install will be prompted for the license email once.