@echo off 
setlocal EnableExtensions DisableDelayedExpansion

set "search=<WindowsTargetPlatformMinVersion>10.0.19041.0</WindowsTargetPlatformMinVersion>"
set "replace=<WindowsTargetPlatformMinVersion>10.0.40219.1</WindowsTargetPlatformMinVersion>"

set "textFile=*.vcxproj"
set "rootDir=."

for /R %%j in ("%rootDir%\%textFile%") do ( 
    echo %%j
    for /f "delims=" %%i in ('type "%%~j" ^& break ^> "%%~j"') do (
        set "line=%%i"
        setlocal EnableDelayedExpansion
        set "line=!line:%search%=%replace%!"
        >>"%%~j" echo(!line!
        endlocal
    )
)

endlocal