Updating Fusor Studio

Fusor Studio looks for a newer build on its own, downloads it quietly in the background, and installs it on a restart you chose. Between beta builds there is nothing to download by hand.

Fusor Studio never restarts itself

A downloaded update sits on disk until you close the app. Quit normally and it is applied on the way out; the next launch is the new build. If you would rather not wait, Restart & Install closes and relaunches Fusor Studio immediately.

No setting changes this.

Where to look

Open Settings (App menu → Settings..., or Ctrl+,) and choose the General tab. About & Updates is the last section on it.

The version number sits at the top of the section, next to the app name. Underneath it is one line of plain text describing where the update stands:

When a check has completed this session, the same line ends with the time it finished, for example Last checked 13:42.

Two buttons sit below the status:

• Check now. Asks the update server straight away. It's unavailable while a check or a download is in progress.
• Restart & Install. Appears once a build has finished downloading. It closes Fusor Studio and reopens it on the new version.

When it checks on its own

The first check runs about half a minute after launch, once startup has settled. After that Fusor Studio checks every six hours while it's open.

Why an update sometimes waits

Two things hold an update back while you're mixing. Both say so on screen, in orange text under the status line.

The download waits for the mix to end

A download competes for the disk, so Fusor Studio doesn't start one while a transition is live. The status stays at available and a second line gives the reason:

A transition is running — the update will download once the mix is over.

Nothing needs doing. Fusor Studio re-checks every couple of minutes and starts the download on its own once the player is idle again. A transition that is paused, still starting up, or waiting to complete counts as running for this purpose, so the download can wait a while past the last fader move.

Restart & Install is unavailable while a fusor is armed

An armed fusor is queued for your next mix, so Fusor Studio won't take the app out from under it. The Restart & Install button is disabled while a fusor is armed, and the reason appears directly below it:

A fusor is armed for the next mix — the update will install next time you restart Fusor. Disarm first if you want to restart now.

Disarm and the button becomes available. Leaving the fusor armed costs you nothing either way, since the downloaded update is still applied whenever you next close the app.

The button is unavailable mid-transition too, with the reason naming whatever the player is doing.

Updates need an installed build

Automatic updating only exists in an installed copy of Fusor Studio. Run it from source and About & Updates shows the version with one line:

Automatic updates are only available in an installed build.

Fusor Studio shows no update buttons in that state.

When a check or download fails

The status line turns red and carries a sentence describing what happened:

There's no error code to quote in a bug report. Update activity stays off the player's status line, well away from your mix, so the detail goes to the log instead.

To capture it, open Settings → Logging, turn Verbose logging on, and set the Updates category to debug. That category records every check, download, deferral and install attempt. Reproduce the problem, then click Reveal current log file and attach main.log to your report. See Logging for the full workflow.