Clear recent levels in preferences

After the ALF upgrade, you may find that Avara crashes on open. This has to do with preferences saved for recent levels you've created. Follow the steps to clear this list:

• Windows - copy this string: %UserProfile%\AppData\Roaming\Avaraline\Avara
  press Win + R, paste, and press enter.
• macOS - copy this string: ~/Library/Application Support/Avaraline/Avara/
  press Cmd + Shift + G, paste, press enter.
• Linux: ~/.local/share/Avaraline/Avara/
  Navigate to this path with cd

You can delete prefs.json and it will be recreated next time you launch Avara. If you've customized your controls or don't want to delete your preferences for other reasons, follow the steps below.

Open the file prefs.json in a text editor (TextWrangler works and is free)

Find the "recentSets" and "recentLevels" keys

Delete everything between the [ and ]. for example, if you see:

     "recentSets": [
        "scarlet-pimpernel-beta-0919",
        "aa-abnormal",
        "net-99",
        "the-codex",
        "t-plus-5-part-b",
        "someset",
        "4-isles",
        "disk-o-tech-light",
        "aa-normal",
        "the-codex"
    ],

Make it look like this:

    "recentSets": [],

And make sure you do this for both recentSets and recentLevels.