Keep every installer you have ever downloaded. Create a folder named Installers_Legacy on a NAS drive. Inside, place Composer_1.9.5_Final.exe , Composer_2.4.0.exe , and Composer_3.0.2.exe . Do not trust the cloud. The day you need that premiere composer old version is the day the official website redirects you to a "404 - Not Found."
Newer versions of Composer leverage GPU-accelerated features that require DirectX 12 or Metal. If you are running a legacy workstation with an old NVIDIA GTX 900 series card, a modern Composer may crash on launch. The often has lighter system requirements, running smoothly on hardware that has been declared obsolete by modern standards. premiere composer old version