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To update Tonido core, login to your account, click on "Tools" -> "Settings" from the top menu bar. Click on "Check for Update" button.
If you get a message that says update available, click on "Update Now" link. This will update the Tonido core application software. Once the update is complete you need to re-login into Tonido to update Tonido applications. (Wait for 2 minutes for Tonido to restart after update).
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To update Tonido applications, login to your Tonido account, click on "Tools"->"Settings" from the top menu bar. Click on "Check For Updates" button and click on application updates. You will now see a list of Tonido applications. Click on "Update All Apps" button on the top of the application list panel. This will update any applications. No restart is necessary.