I made a lot of windows with the vertical split option

Question

I made many vertical splits when I was trying to join them. To collapse them I joined the split over the original copy. Is there a way for me to get back to the original window?

Answer 1

Option 1 (without closing your file)

1. On the Workspace bar click on + to add a new workspace
2. Optional: delete the old one

Option 2

1. Save File and close Blender
2. Than open Blender again
3. Click top left on File > Open
4. In the pop-up screen click top right on the Gear Icon
5. Uncheck Load UI (user interface)
6. Select your File to Open

Answer 2

One way to do it is to open the file through File>Open or Ctrl+O and disable Load UI:

Then it will use your default layout and you can save the file to make it permanent.