Officially, Topaz Labs does not offer a standalone "portable" version (e.g., a single .exe file that runs without installation). The software typically requires a full installation to manage its massive AI model files, which can take up of internal storage.
Topaz Gigapixel AI relies heavily on GPU acceleration and constant model updates. A portable version—especially a cracked one—will deliver frustratingly slow speeds, low-quality upscales (missing advanced models), and potentially infect your system.