Open Runway in the IM Runway app
Runway works only in the IM Runway app. The app runs Runway's helper on your computer, which is how Runway reaches Zoho, Jira, your AI and your files as you. A web browser doesn't have the helper, so Runway doesn't open here.
This opens the same place in the app, if it's on this computer. A link from Slack or an email opens the app by itself: when your browser asks, tick Always allow and it won't ask again.
Get the app
Runway runs on Mac and Windows computers. Download the one for the computer you'll use.
Open the file and follow the installer: Continue, then Install. It installs for you only, in the Applications folder in your home folder, so it doesn't ask for an administrator password. IM Runway opens by itself when the installer finishes; later, open it from Launchpad or Spotlight.
The first time, the Mac may say it can't check the installer, because it isn't signed yet. Right-click the file (or hold Control and click it), choose Open, then Open again. If the Mac only offers Done or Move to Bin: choose Done, open System Settings, then Privacy & Security, scroll down, choose Open Anyway, and confirm.
Got IM Runway already? This replaces it with the new version: quit it first.
To check the download is the one Runway published, its SHA-256 is 6bb4f93f4892b62b57cb448ba7ee294b451290872fa66c1290d9cf70f7d8038a
Download IM Runway for Windows
Open the file and follow the installer. It installs for you only, so it doesn't need administrator rights, and puts IM Runway in your Start menu and on your Desktop. IM Runway opens by itself when it's done.
The first time, Windows may say "Windows protected your PC", because it isn't signed yet: choose More info, then Run anyway. If your browser asks whether to keep the file, choose Keep.
Got IM Runway already? This replaces it with the new version: close it first. To remove it: Settings, Apps, IM Runway, Uninstall.
To check the download is the one Runway published, its SHA-256 is 0c1eb47395ef233da68624a37a1c542219a07eed780a3e1a65a159d00e401768
Only the app shows Runway: that's the rule, and this page is how it's kept. It isn't a lock against someone technical who tries to get round it.