If you have SH4 installed in a Program Files folder, then that could be the reason the SH4.exe reverts back to Read-only. Having SH4 installed there would cause other modding issues also, and cause several CTD situations. You would want to re-install the game in a folder of your own making not in Program Files, such as "C:\Games\Silent Hunter...", or whatever you want to name it. Also, if you are not running Windows with Administrator priveleges, that could possibly do it also.
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