Export to json is working fine for me with latest version. Maybe you didn't update in correct way? I don't know if its first time you doing update with r2la. Make sure you did all steps like described here - https://steamcommunity.com/sharedfiles/filedetails/?id=553607744 - "Upgrading to newer version of r2la". Never delete your previous version if you updating, in case something goes wrong you can use old version. Try unziping new version of 2.058.21. Start it and create some simple championship with 1 race result, then try export, will it work? Oh, wait, do you mean export never worked even in 2.058.20?