Patch 1.07 brings the following:
Added Option to run in windowed mode.
Adjusted UI in main menu so users with 5120x1440 can now use it.
Fixed a bug where a certain secret boss was not opening their gate once defeated.
Thanks for all the feedback!
Patch 1.07 Details
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 18578016 · public branch
Steam updated · First observed