Download Trestle

Two installers, and they go on different machines. Start with the first one. The second is only worth installing once the first is running. Both are free to download, and Trestle runs on the free plan straight away; a subscription is what lifts the caps and turns on the money features.

Trestle

Required

The office computer

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Install this on the one PC that will hold the firm's data. It starts with Windows, hosts the app over your office network, and everyone else reaches it in a browser, with no installation on their machines.

Windows 10 or 11, 64-bit
Runs from the system tray; starts automatically
Asks where to keep the data folder, and that folder is your backup
Free to run. A subscription needs the internet once, and never again

Trestle Companion

Optional

Everyone else's computer

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Optional, and only useful once Trestle is running somewhere on the network. It lets a drawing open in AutoCAD straight from the browser and saves every Ctrl+S back to the office PC, instead of downloading and re-uploading files by hand.

Windows 10 or 11, 64-bit
Installs for one user, so no administrator password is needed
Does nothing at all until Trestle is on the network
No sign-in, no settings, no data of its own

After you install Trestle

1Open Trestle on the office PC and sign in. It works immediately on the free plan, up to 5 projects and 3 team accounts, with the money features switched off. Nothing to activate, and no trial clock.
2Bought a plan? Activate it under Settings → Subscription: sign in with the email and password from your Trestle account, or paste an activation code from your account page. That PC needs the internet for this one step, and never again.
3Everyone else opens http://<office-pc-name>:3000 in a browser. Nothing to install on their machines.
4Moving to a different computer later? Deactivate the old one first, in Trestle under Settings → Subscription or from your account page, then activate the new one. A licence lives on one PC at a time.