Backup/restore open windows

@echo off
title Create a backup of open folder windows
setlocal enabledelayedexpansion

powershell  @^(^(New-Object -com shell.application^).Windows^(^)^).Document.Folder.Self.Path >> prevfolderpaths.txt

FOR /F "tokens=*" %%f IN (prevfolderpaths.txt) DO (

set "var=%%f"
set "firstletters=!var:~0,2!"

IF "!firstletters!" == "::" ( ECHO start /min shell:%%~f >> foldersession.bat) ELSE ( ECHO start /min "" "%%~f" >> foldersession.bat)

)

del "prevfolderpaths.txt"