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While X4 is a robust legacy version, it lacks many modern BIM (Building Information Modeling) features found in current releases.
Ask the seller for the serial number before paying.
When opening X4 files in newer versions, it is recommended to use the "Backup Entire Plan" tool in X4 first to ensure all textures and material libraries are preserved.
To ensure your verified serial number activates correctly, your hardware must meet these original specifications:
A legitimate transfer requires the seller to contact the developer and pay a transfer fee. Without this process, the serial number may remain locked to the original owner's account. Legacy System Requirements for X4
If you have proof of purchase but no digital record, contact the Chief Architect Sales team . They can verify your ownership in their database and reissue your serial number. Verifying a Used License Before Purchase
Windows 7, Vista, or XP (32-bit and 64-bit supported).
Table_title: Upgrade pricing Table_content: header: | Upgrade from | First-year cost | After the first year | row: | Upgrade from: MyArchitectAI
If you already own Chief Architect Premier X4 but cannot find your credentials, you can retrieve them through these official channels:
Visit the official website and sign in to your online account . Navigate to the Digital Locker: Downloads, Product Keys & License Management section. This is the primary repository for all your verified product keys.