getWinEdt()
installWinEdt(InstallRoot, ApplData, WinEdtVersion, force = FALSE)
startWinEdt(InstallRoot, ApplData, WinEdtVersion, args = NULL)
FALSE
(default), no files of an already installed version of R-WinEdt are overwritten;
if TRUE
those files will be overwritten; if NULL
, the user will be asked.