I found something weird that is happening with at least DeNoise AI 3.0.3 and Sharpen AI 3.0.3. Gigapixel 5.5.1 has the save options in the preferences but does not apply them, it again overwrites the original .jpg.
If I open a picture by right clicking a photo in Windows Explorer and selecting open with, the picture opens in the programs but there are no save options at all. I opened a .jpg and it overwrote my original photo. I opened a .ARW RAW and it saved it somewhere, I cannot find where it put it. There are also no save as option (except in Gigapixel and no default where to save option, only to add suffix etc which does not work) and nothing ion the preferences for saving. If I open the program and then load the picture, everything is working as expected except still no preference on a folder on where to save unless I go into the menu and click save as but that option is not there when I click on photo and use open with.