Reset Workspace is a Blender add-on by Trukas that resets the user interface using the layout saved in your startup file. You trigger it from the Window menu with Window > Reset Workspace.
Under the hood, it loads your startup file and its UI, then reloads your current file with the "Load ui" option unchecked. The outcome is your current file's data paired with the default UI, useful after your workspace layout has been changed. Reset Workspace is compatible with Blender 4.2 LTS and newer, released under the GNU General Public License v3.0 or later, and requires no special permissions to run.
Installation is straightforward: drag and drop the add-on into Blender, or download it and install from disk. The add-on is 5.0 KB in size. Version 0.0.4 optimized add-on loading time by reloading modules only if necessary. Full source and issue tracking are available on the developer's GitHub page.