Re-installation problem (Trados Studio 2019 SR1)

I tried to uninstall and re-install Trados Studio 2019 SR1. However, after uninstalling it, I cannot access your FTP server...(gateway.sdl.com/.../communityknowledge. Although I tried it using FTP app, I could not access due to the password (5dlpatch35). What should I do to reinstall it?

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