You generally cannot have the official TikTok app and the Pro APK installed at the same time. Uninstall the official version first.
Upon opening, look for the "Mod Settings" or "Region" menu to select your desired content location. Important Safety Warning Using modified APKs comes with significant risks: You generally cannot have the official TikTok app
Locate the downloaded file in your "Downloads" folder and tap it to install. You generally cannot have the official TikTok app