Portable versions strip out Adobe Application Manager. You cannot install brushes, plugins (Nik Collection, Topaz), or filters. The software will crash if you try to open a modern .CR3 or .HEIC file.
: This is the most powerful and feature-rich open-source alternative to Photoshop. It supports layers, masks, a wide range of filters, and scriptable automation, and it runs on Windows, macOS, and Linux. For those transitioning, patches like "PhotoGIMP" can make the interface more familiar to Photoshop users. Portable versions strip out Adobe Application Manager
If you need a portable offline version, your safest bet is creating it yourself from a legitimate license, not downloading a pre-made one. plugins (Nik Collection