Authoring access and licenses

A current license enables creating and editing drawings. Without one, Redline can still open, navigate, and export existing drawings. You can also save work already in progress if your license expires.

License status

Open Account and license... to see your installation and license expiry. Company access requires an assigned seat, not just company membership.

Browser sign-in

Redline shows a confirmation code and sign-in URL for this installation. Complete sign-in on the website. If several access options are available, choose your individual license or the company you want to use.

The application's license status shows when activation is complete. You can also continue without signing in to use viewer mode.

Offline activation

Export an installation request and email it for manual review using the licensing contact on your account page. This applies to individual subscriptions and company seats. If approved, import the supplied file into Redline, or paste its contents into the offline-key control. The request identifies the installation; only the issued license file activates it.

Paid licenses include 15 days of grace after the earliest of the subscription period end, a scheduled end, or the license key's expiry. The displayed final expiry includes that grace; losing internet access does not start a new grace period. Trials last up to 30 days, ending earlier if the key expires, with no grace period.

Yearly billing does not issue a year-long authorization. Each yearly-plan authorization is capped at 30 days from issuance plus 15 days of grace, or an earlier entitlement boundary plus grace.

To renew an offline installation, email the same request from an internet-connected computer, then transfer and import the new license file. The licensed computer does not need an internet connection.

Renewal and sign-out

Online renewal checks your access and updates the local license expiry. During paid grace, a warning shows the final expiry and opens the license controls. Renewing your access can extend the expiry; reconnecting alone does not. Signed-in installations check on startup and then daily. Confirmed entitlement revocation disables editing; temporary network or provider failures preserve the cached license until its expiry.

Manage billing, company seats, and installations on the account website. Signing out in Redline stops automatic renewal but does not cancel your subscription. An already issued license remains usable until it expires, unless Redline learns that access has been revoked.

Resetting an installation

Resetting clears local license state and gives the installation a new identity. It does not remove project files or drawing styles. Activate again or obtain a new offline license for the new identity.

To release the old installation's slot, sign out on that computer and deactivate it on the website. Without signing out, automatic renewal may activate it again. An already issued offline license remains valid until its final expiry.

For drawing recovery, see 项目文件、保存与恢复.