Program: Godot Engine
License: Open Source/MIT
Description: Godot provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel. Godot is completely free and open source under the very permissive MIT license. No strings attached, no royalties, nothing. Your game is yours, down to the last line of engine code.
Website: https://godotengine.org/
Other: User settings stored at: %DRIVE%:\Users\%USER%\AppData\Roaming\Godot
This looks like an interesting app, I'll take a look at it.
For reference, godot has a "self-contained" mode we can use rather than APPDATA: http://docs.godotengine.org/en/stable/reference/packaging_godot.html#sel...
I've uploaded a development test, please try it: https://portableapps.com/node/55471