Troubleshooting

Activation fails with "seat limit reached": revoke an unused device from Dashboard → Devices, then retry.

"License token invalid" after a hardware change: major hardware changes can alter the device fingerprint. Sign out and sign in again to re-activate; if the seat is stuck, use "Reset activations" on the license page (allowed once per 30 days) or contact support.

App can't reach licensing servers: check that your proxy/firewall allows HTTPS access to devtune.app. The app remains usable during the offline grace period.

Download shows "unknown publisher": expected for the current unsigned builds — see "Security & the download warning".

For anything else, contact support with the diagnostic bundle from Settings → Help → Export diagnostics.