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This may work for you, but the short pathnames and filenames may not be valid for some people - I suspect.
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I entirely agree, that's why I said "something like", meaning "adapt paths/filenames to your configuration"...
I used short paths since under Win95, when I first did used this, paths ...

I use since version 3 something like:
[HKEY_CLASSES_ROOT\*\Shell\OpenWithTextPadHex]
@="Open with TextPad (Hex)"
[HKEY_CLASSES_ROOT\*\Shell\OpenWithTextPadHex\command]
@="C:\\PROGRA~1\\TEXTPA~1\\TEXTPAD.EXE -s \"%1(0x0001)\""
[HKEY_CLASSES_ROOT\*\Shell\OpenWithTextPadText]
@="Open with TextPad ...

I would prefer to be able to use the Tile Horizontal/Vertical Icons with selected documents/tabs since I never remember if Vertical means vertical shaped windows side by side or horizontal windows one above the other

bbadmin wrote:The facility to minimize document windows in MDI mode has not been implemented in TextPad 5.

I hope you will implement it soon in a next release, I'm missing it a lot !