Hey all! I had a request to add an option to play the base game without losing challenge mode progress and there was also an issue with a potential softlock when doing the adjacency challenge.
You can now reset all progress in the settings menu without resetting challenge achievements (default), or check the checkbox when resetting to remove all challenge achievements as well.
As a side note, due to how things are coded, if you choose not to reset challenge achievements, you'll retain their bonuses when playing the base game (which might be more fun anyways!).
I also fixed the game icon on the task bar (again). For some reason it keeps resetting to the default Unreal one.