Copy/paste the code into notepad, edit the paths and save it somewhere (NOT in the mircdir) as copymirc.vbs.
Rightclick on the mirc icon in the startmenu/desktop/wherever and choose "Properties".
In the "Target" field, change "C:\path to \mirc.exe" to "X:\path to\where you saved\copymirc.vbs"
Change the icon from the same dialog, browse to the backup mirc and use that.
Run it... smile

The script assumes the working mircdir as "C:\mirc", and the backup folder "D:\mircbackup". Naturally, you'll have to edit the "paths" to suit.


Code:
'copymirc.vbs
 
On Error Resume Next
Dim fso, shell
set fso = CreateObject("Scripting.FileSystemObject")
fso.DeleteFolder("[color:green]C:\mirc[/color]")
' The above line is where the folder "C:\mirc" is deleted.
 
fso.CopyFolder "[color:green]D:\mircbackup[/color]","[color:green]C:\mirc[/color]"
' This is copying everything in "D:\mircbackup" to "C:\mirc"
' "C:\mirc" is recreated in this process.
 
set shell = WScript.CreateObject ("WSCript.shell")
shell.run "[color:green]C:\mirc\mirc.exe[/color]"
' Finally run mirc.exe
' Use a short file name here if there are any spaces in the path.
' e.g. "C:\Progra~1\mirc\mirc.exe"
 
'EOF

Note: the paths must be enclosed in "quotes", as in the examples I used.