on1[.]com
ON1 Effects 2025 is a large app, taking up ~550MB in the program's folder and 1.7GB in ProgramData\ ON1\. During installation you can choose where each of those folders is located, e.g., on another drive. ON1 is giving away Effects 2025 in hopes that it'll boost sales of their flagship Photo RAW. Rather than a key, ON1 requires you to have [or set up] an account -- when you 1st start the app you sign in that first time to unlock it.
When ON1 had a few offers on GOTD years ago their software took getting used to -- it wasn't that the GUI design was bad, but it was just Very different from most photo editing apps. Effects 2025 isn't That out of the ordinary, but it's definitely not a clone of any other app I'm aware of. Along with the app download itself they offer a downloadable PDF manual and an online Quick Start Course to get you going.
on1[.]com/videos/getting-started-in-effects-2025/
Effects 2025 does have & use AI, but not for things like enlarging or denoise -- you can buy those separately &/or they're included in the top end app. Effects 2025 uses AI to add generated looks, and has automatic subject/object selection. All in all this photo editing app with layers is well worth the free price, providing you've got the disk space.