adjust filename slash, when changing shellslash option to a sane value
use wscript to call vbscript
do not fnameescape for delete() function (doesn't work on windows with c:\file syntax)
start UAC session without a command prompt window
skip setting filename setting, if fnameescape returns empty string
make sure, to compare full path, before trying to set filename after write/read
check file modification time, before asking user to reload file
updated vimball
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