Opening AUP Files

For anyone having this problem, my advice would be:

  1. Uninstall Audiotonic

  2. Download and install the real “Audacity 2.4.2” (available via the Audacity website: https://www.audacityteam.org/download/)
    During the installation, enable the option to “Reset Preferences”.

  3. If you need to fix any broken projects, get a “plain text editor” (For Windows I’d recommend NotePad++).
    (make a backup copy of the .AUP file before doing anything else)
    Open the .AUP file in NotePad++ and find this near the top of the file:

version="2.1.0.0" audacityversion="2.1.0.0"

change that to:

version="1.3.0" audacityversion="2.1.0"