I hope you didn’t mix 1.3 files with 1.4, as the new version should be unpacked to a clean directory.
That said, please confirm that you download 1.4 from the official links provided in qb64.org, also that you unpacked all the contents of the package to a clean directory to which you have full read/write permissions.
Also, please indicate which OS you’re using. If Linux, make sure to run the setup script upon unpacking.
Welcome to the forum.