How to reset sourcetree settings/preferences

You could see if the process describe in Wiping SourceTree Preferences can help - but be careful:

Please note that wiping the preferences will mean you will lose your bookmarks and view settings.
Please back these up in the event that wiping your preferences isn't the cause of the problem.

Windows

• Make sure SourceTree is closed
• Make sure the files are backed up in the following folders before removing the files
• Remove files "bookmarks.xml", "opentabs.xml", "userhosts" in C:\Users\<username>\AppData\Local\Atlassian\SourceTree\
• Remove file in C:\Users\<username>\AppData\Local\Atlassian\SourceTree.exe<random_string>\<version_number>\user.config
• Open SourceTree again to test if it worked or not.

Mac

• Make sure SourceTree is closed.
• Make sure the files are backed up in the following folders before removing the files
• Remove everything in ~/Library/Application Support/SourceTree/
• Remove ~/Library/Preferences/com.torusknot.SourceTreeNotMAS.plist (you should be using the direct version of SourceTree, hence "NotMAS")
• If you're using Mavericks or later, log out and log back in. Mavericks caches all Preferences while you're logged in and deleting the files doesn't actually clear the settings any more.
• Open SourceTree again to test if it worked or not.

(Those are hidden folders/files: you can look for them in Finder)

[...]

If this didn't fix your problems then close SourceTree and restore the files, then re-open SourceTree again (if at all possible).

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Update 2018: Skychan adds in the comments

With the current version, 2.7+ you need to also delete (backup) the two .json files in the \Atlassian\SourceTree\ directory.

(On MacOS: /Applications/SourceTree.app/)