QuickGamma version 4.1 does not run on older Windows versions, but only on Windows 10 or higher. QuickGamma is available as 64-bit and 32-bit version, both of which are included in the installation file. The appropriate version of QuickGamma for the installed Windows version is automatically installed. The QuickProfileLoader program is integrated into QuickGamma and is installed automatically. If QuickProfileLoader is already installed as a standalone program, it will be uninstalled automatically during the QuickGamma installation.