Weakaura compression method has changed from Legion to BfA. This tool converts a Legion Weakaura compressed with the new method to the old one, allowing it to be imported with an older addon version. Weakaura must start with an "!" or it does not match the new compression format. Note that a weakaura cannot be imported with an addon version lower than the version the weakaura was written for. A weakaura specifically written/updated for BfA or Shadowlands cannot be imported with a Legion client. This is any weakaura shown with an "Import Date" past 2018 on the wago page. A WEAKAURA VERSION WITH AN IMPORT DATE PAST 2018 (AS SHOWN IN THE WAGO VERSIONS TAB) CANNOT BE IMPORTED WITH A LEGION CLIENT. INSTEAD, GO TO THE VERSION TAB OF YOUR WEAKAURA AND GRAB ONE WITH AN IMPORT DATE NOT LATER THAN 2018 (BEFORE BFA) IF EXISTS.