File Download ((top)) — Altium Designer License
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| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | "Invalid license file" | File corrupted or edited | Re-download from Altium Dashboard | | "License expired" | Subscription ended | Renew subscription or request new file | | "Machine ID mismatch" | Used on wrong PC | Deactivate on old PC; generate new file for new PC | | "File not signed by Altium" | Attempted cracked/pirated license | Delete file immediately; scan for malware |
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Used primarily by large enterprises and defense contractors, a Private License Server manages a pool of licenses locally within a private network. This is critical for high-security environments where workstations are strictly forbidden from connecting to the outside internet.