ive downloaded program twice , but cant get into the program, just keeps asking to install again

ive downloaded the program twice , created shortcut, but when i try to open program it just takes me back to install

https://www.libreoffice.org/get-help/system-requirements/

https://www.libreoffice.org/download/download/

https://www.libreoffice.org/get-help/install-howto/