Blank Workspace Is No Longer Blank

Assuming that you want to preserve the current layout, do the following:

1. Open NinjaTrader Control Center
2. Go to File > Workspaces > Save Workspace As.... (assign any name you want)
3. File > Workspaces > Open Workspace (select blank and open it)
4. Close all charts within blank workspace
5. File > Workspaces > Save Workspace

Now you can go to File / Workspaces and you will see the new one you made in the list and the blank one.

If you just want a clean slate quickly, you can open the xml file and wipe it out.

1. Open Windows Explorer and navigate to My Documents\NinjaTrader 7\workspaces
2. Right-Click "_blank.xml" and Open With Notepad.
3. Delete everything in that file, so it's completely empty and save it.