Thanks for the feedback. Problem is – I can’t reproduce the behavior. Using Windows 10 and Notepad it appears to work as expected, both with one or several encrypted text files open.
You seem to know your way around Windows. Check with Task Manager if all instance of Notepad.exe have been closed, and you still have the broom. You can also try to find what’s keeping the file open (if that’s what happening) using Resource Monitor. Open Task Manager, then the Performance Tab. There there’s a link to open Resource Monitor. Select the CPU tab. Then there’s a section call “Associated Handles”. Search for your file there. Normally, Notepad will *not* actually keep a text file open.