: Users with older licenses (v1, v2, or older v3) must purchase a v4 upgrade license. During the installation of a v4 upgrade, you will be prompted for your new v4 key and your previous version's key. Key Format : A v4 license key always begins with the prefix , whereas older keys start with

: A single key works for both Windows (64-bit) and macOS (native build).

MoI3D v4 is available in several tiers depending on whether you are a new user or upgrading from a previous version:

Visit the MoI3D Lost Key Page and enter the email address used for purchase. If you'd like to move forward, I can:

: The software does not bind to a specific hardware signature, making it easy to move to a new machine without a formal "deactivation" process. Pricing and Upgrade Paths

: During setup, you will be prompted to enter your V4 key. If you are using an upgrade license, the installer may also ask for your previous version (e.g., V3) key to verify eligibility.

: The license is a one-time purchase with no subscription fees.