: If you purchase the app through the Microsoft Store , no key is required; the full version is automatically activated when you sign in with the correct Microsoft account.
Activation keys are strictly tied to specific major versions. A key for will not work for newer versions like File Viewer Plus 6, and vice versa. If you are using version 4, ensure your activation requests are sent to the correct legacy server, as newer versions use a different activation endpoint. Buy File Viewer Plus activation key for file viewer plus 4 full
To activate File Viewer Plus 4, you must use a unique activation key provided by the developer upon purchase. How to Obtain Your Key Email Receipt : If you purchase the app through the