Translations can be downloaded from the Languages page:
https://www.thetournamentdirector.net/languages.htmlVersion 3.7 installs in a different location, and thus doesn't technically "upgrade" version 3.4.3 (or earlier versions). After you install 3.7, version 3.4.3 will still be there. Once 3.7 is installed, you can uninstall 3.4.3. Going forward, new version (3.7.1, or whatever is next)
will upgrade the existing version. In fact, until the next major version, the application should actually update itself.
Translations are also installed in a different location. Thus translations you had installed in an earlier version won't automatically be available in 3.7. You can either download and install the language you need from the TD website (see link above), OR you can copy your installed language files to the new location. To do this copy everything from
C:\Program Files (x86)\The Tournament Director 3\lang to
%localappdata%\Programs\TheTournamentDirector\lang.