zandrag: Not sure they will update the offline installers. Do you want me to copy the cmd file? It does have to be run twice as admin. But once done... the HOMM1 editor works fine.

---- start of editor.cmd file----
@echo off
@REM SET locpath=%~dp0
@REM SET locpath=%locpath:~0,-1%

setlocal
cd /d %~dp0

SET regpath="HKEY_LOCAL_MACHINE\SOFTWARE\New World Computing\Heroes of Might and Magic\1.0"

REG ADD %regpath% /v "Editor Show Menu" /t REG_DWORD /d 1 /f /reg:32
REG ADD %regpath% /v "Editor X" /t REG_DWORD /d 10 /f /reg:32
REG ADD %regpath% /v "Editor Y" /t REG_DWORD /d 10 /f /reg:32
REG ADD %regpath% /v "Editor Width" /t REG_DWORD /d 800 /f /reg:32
REG ADD %regpath% /v "Editor Height" /t REG_DWORD /d 600 /f /reg:32
REG ADD %regpath% /v "Editor Full Screen" /t REG_DWORD /d 0 /f /reg:32

start EDITOR.exe
exit
---that was the end of editor.cmd file"

Honestly, run that as admin twice. The editor will run in wodowed mode there on even if started from windows directly.

Note: filename.cmd are the Windows NT (Xp/Vista/7/8/10/11/whatever comes in the future) equivalent batch file. Or consider it a windows script file.